Two men have been arrested after more than eight kilograms of the drug MDMA were found in separate shipments of pet food.
Two separate investigations have been launched by a joint unit of National Crime Agency (NCA) and Police Scotland officers into the finds.
The first discovery was made by Border Force officers who discovered two parcels destined for addresses in Scotland at a postal hub in Coventry.
One parcel containing dog food had been shipped from Belgium and the other, purporting to be cat food, had come from Germany.
The two seizures aren’t being linked at this time.
A 26-year-old man in Kirkcaldy has been arrested in connection with the first package while a 20-year-old man was detained in Forfar on August 3 in connection with the second.
NCA Scotland Operations Manager Rob Miles said: “These tablets can be extremely potent and you are putting your health at risk if you take them.
“These drugs have a serious and significant negative impact on our communities – drug deaths in Scotland are still at a very high and tragic level.
“This is why the Organised Crime Partnership is committed to targeting all aspects of drug crime, and in particular the NCA and Police Scotland are working together with Border Force to disrupt the wholesale importation of these deadly substances.
“We’ll continue to do all we can to target the criminal networks involved and protect the Scottish public.”
Detective Inspector Gordon Constable of Police Scotland said: “Tackling organised crime and disrupting the activities of those involved remains a priority for OCP (Scotland) officers.
“We will continue to work closely with our colleagues in the NCA and members of the Serious Organised Crime Taskforce, which underlines our commitment to the country’s serious organised crime strategy.”