Humza Yousaf has led calls for Westminster to be recalled after the US and British militaries bombed more than a dozen sites used by the Iranian-backed Houthis in Yemen.
The massive retaliatory strike used warship and submarine-launched Tomahawk missiles and fighter jets, American officials said.
The US Air Force’s Middle East command said it hit more than 60 targets at 16 sites in Yemen, including “command-and-control nodes, munitions depots, launching systems, production facilities and air defence radar systems”.
Yousaf said MPs should return to the House of Commons this weekend to scrutinise the UK Government over the move.
The SNP leader, along with the party’s leader at Westminster, criticised the UK Government for not holding a vote on whether to go ahead with the strikes.
Yousaf told STV News that as a member of the Privy Council his office asked on Thursday for him to be briefed on the military action but that had not happened.
He said he did not have the “full facts” and did not support the strikes.
The First Minister said: “We absolutely agree that Houthi attacks in the Red Sea must stop.
“But we are extremely concerned that in a region that needs de-escalation, the latest military intervention by the UK will be an escalation.
“The UK Government should have recalled parliament today to set out to MPs the legal basis for the military intervention, what is the objective and end goal and what security advice they have taken about the implication both in the region and here at home.”
Yousaf said he wished the UK and the rest of the world “cared for the over 7,000 innocent children that have been killed in Gaza as much as they care about cargo”.
Speaking at the SNP’s general election campaign launch, SNP Westminster leader Stephen Flynn said it was a “surprise” that he was in Glasgow for the campaign launch and not in the Commons.
The MP said: “Myself and my colleagues should currently be in Westminster questioning the United Kingdom Prime Minister on his decision to launch military action.
“It is right that Parliament be recalled this weekend, so that MPs across the board can better understand the decision that has been taken, but also get answers on the consequences and what comes next.”
US President Joe Biden said the strikes were meant to demonstrate that America and its allies “will not tolerate” the militant group’s ceaseless attacks on the Red Sea.
And he said they only made the move after attempts at diplomatic negotiations and careful deliberation.
“These strikes are in direct response to unprecedented Houthi attacks against international maritime vessels in the Red Sea — including the use of anti-ship ballistic missiles for the first time in history,” Mr Biden said in a statement.
He noted the attacks endangered US personnel and civilian mariners and jeopardised trade and added: “I will not hesitate to direct further measures to protect our people and the free flow of international commerce as necessary.”
Associated Press (AP) journalists in Yemen’s capital, Sanaa, heard four explosions early on Friday local time.
Two residents of Hodieda, Amin Ali Saleh and Hani Ahmed, said they heard five strong explosions hitting the western port area of the city, which lies on the Red Sea and is the largest port city controlled by the Houthis.
Eyewitnesses who spoke with the AP also said they saw strikes in Taiz and Dhamar, cities south of Sanaa.
The strikes marked the first US military response to what has been a persistent campaign of drone and missile attacks on commercial ships since the start of the Israel-Hamas war.
And the co-ordinated military assault comes just a week after the White House and a host of partner nations issued a final warning to the Houthis to cease the attacks or face potential military action.
The officials described the strikes on condition of anonymity to discuss military operations. Members of Congress were briefed earlier on Thursday on the strike plans.
The warning appeared to have had at least some short-lived impact, as attacks stopped for several days.
On Tuesday, however, the Houthi rebels fired their largest barrage of drones and missiles targeting shipping in the Red Sea, with US and British ships and American fighter jets responding by shooting down 18 drones, two cruise missiles and an anti-ship missile.
And on Thursday, the Houthis fired an anti-ship ballistic missile into the Gulf of Aden, which was seen by a commercial ship but did not hit the ship.
In a call with reporters, senior administration and military officials said that after Tuesday’s attacks, Mr Biden convened his national security team and was presented with military options for a response.
He then directed defence secretary Lloyd Austin, who remains in hospital with complications from prostate cancer surgery, to carry out the retaliatory strikes.
In a separate statement, UK Prime Minister Rishi Sunak said the Royal Air Force carried out targeted strikes against military facilities used by the Houthis.
The Ministry of Defence said four fighter jets based in Cyprus took part in the strikes.
Noting the militants have carried out a series of dangerous attacks on shipping, he added: “This cannot stand.”
He said the UK took “limited, necessary and proportionate action in self-defence, alongside the United States with non-operational support from the Netherlands, Canada and Bahrain against targets tied to these attacks, to degrade Houthi military capabilities and protect global shipping”.
The governments of Australia, Bahrain, Canada, Denmark, Germany, Netherlands, New Zealand and South Korea joined the US and UK in issuing a statement, saying that while the aim is to de-escalate tensions and restore stability in the Red Sea, the allies will not hesitate to defend lives and protect commerce in the critical waterway.
Russia, however, requested an emergency meeting of the UN Security Council on the strikes. France, the current council president, said it will take place on Friday afternoon.
The rebels, who have carried out 27 attacks involving dozens of drones and missiles since November 19, had warned that any attack by American forces on its sites in Yemen will spark a fierce military response.
A high-ranking Houthi official, Ali al-Qahoum, vowed there would be retaliation.
“The battle will be bigger … and beyond the imagination and expectation of the Americans and the British,” he said in a post on X, formerly Twitter.
Al-Masirah, a Houthi-run satellite news channel, described strikes hitting the Al-Dailami Air Base north of Sanaa, the airport in the port city of the Hodeida, a camp east of Saada, the airport in the city of Taiz and an airport near Hajjah.
The Houthis later on Friday said the strikes killed five of their troops and wounded six.
A senior administration official said that while the US expects the strikes will degrade the Houthis’ capabilities, “we would not be surprised to see some sort of response”, although they have not seen anything yet.
Officials said the US used warplanes based on the navy aircraft carrier USS Dwight D Eisenhower and air force fighter jets, while the Tomahawk missiles were fired from navy destroyers and a submarine.
The Houthis say their assaults are aimed at stopping Israel’s war on Hamas in the Gaza Strip. But their targets increasingly have little or no connection to Israel and imperil a crucial trade route linking Asia and the Middle East with Europe.
Meanwhile, the UN Security Council passed a resolution on Wednesday that demanded the Houthis immediately cease the attacks and implicitly condemned their weapons supplier, Iran. It was approved by a vote of 11-0 with four abstentions — by Russia, China, Algeria and Mozambique.
Britain’s participation in the strikes underscored the Biden administration’s effort to use a broad international coalition to battle the Houthis, rather than appear to be going it alone. More than 20 nations are already participating in a US-led maritime mission to increase ship protection in the Red Sea.
US officials for weeks had declined to signal when international patience would run out and they would strike back at the Houthis, even as multiple commercial vessels were struck by missiles and drones, prompting companies to look at rerouting their ships.
On Wednesday, however, US officials again warned of consequences.
“I’m not going to telegraph or preview anything that might happen,” secretary of state Antony Blinken told reporters during a stop in Bahrain.
He said the US made it clear “that if this continues as it did yesterday, there will be consequences. And I’m going to leave it at that”.
The Biden administration’s reluctance over the past several months to retaliate reflected political sensitivities and stemmed largely from broader worries about upending the shaky truce in Yemen and triggering a wider conflict in the region. The White House wants to preserve the truce and has been wary of taking action in Yemen that could open up another war front.
The impact on international shipping and the escalating attacks, however, triggered the coalition warning, which was signed by the United States, Australia, Bahrain, Belgium, Canada, Denmark, Germany, Italy, Japan, Netherlands, New Zealand, Singapore and the United Kingdom.
Transit through the Red Sea, from the Suez Canal to the Bab el-Mandeb Strait, is a crucial shipping lane for global commerce. About 12% of the world’s trade typically passes through the waterway that separates Africa and the Arabian Peninsula, including oil, natural gas, grain and everything from toys to electronics.
In response to the attacks, the US created a new maritime security mission, dubbed Operation Prosperity Guardian, to increase security in the Red Sea, Bab el-Mandeb Strait and the Gulf of Aden, with about 22 countries participating.
US warships, and those from other nations, have been routinely sailing back and forth through the narrow strait to provide protection for ships and to deter attacks. The coalition has also ramped up airborne surveillance.
The decision to set up the expanded patrol operation came after three commercial vessels were struck by missiles fired by Houthis in Yemen on December 3.
The Pentagon increased its military presence in the region after the October 7 Hamas attacks in Israel to deter Iran from widening the war into a regional conflict, including by the Houthis and Iran-backed militias in Iraq and Syria.
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