A decision from the BBC not to air an emergency appeal for Gaza attracted dozens of protesters to the broadcaster's Scottish headquarters in Glasgow.
Protesters blocked the entrance and occupied the lobby of the Glasgow building at Pacific Quay. The demonstration ended peacefully after about two hours.
More than 50 MPs have said they will back a parliamentary motion urging the BBC to screen the Gaza aid appeal. The corporation has refused despite more than 10,000 complaints from the public.
The motion was scheduled to be tabled on Monday by Labour's Richard Burden, a member of the Commons' International Development Committee. Mr Burden said he had written to Mark Thompson, the BBC's director general, to press for an explanation for the broadcaster's decision.
"This is not about taking sides in the conflict. It is about providing urgent help to people in desperate need," Mr Burden said. "More than 400 children have died, thousands are homeless and nothing short of a humanitarian catastrophe is unfolding in Gaza."
Douglas Alexander, the International Development Secretary, had made an earlier plea to Mr Thompson, who claims broadcasting an appeal could compromise the impartiality of the BBC's reporting from the Palestinian territory.
First Minister Alex Salmond said it was the "wrong decision" by the BBC. But Culture Secretary Andy Burnham said it was right that broadcasters made their own decisions.
Thousands of people demonstrated against the decision outside the BBC's Broadcasting House in London on Saturday. The corporation's rival terrestrial broadcasters - ITV, Channel 4 and Five - said they would show the advert.
In Glasgow, Strathclyde Police estimated 40 to 50 members of the protest group Stop the War Coalition were involved in the demonstration on Sunday evening. Some of the demonstrators occupied the lobby of the BBC building.
Late Sunday, a spokeswoman for the BBC said its position on the Gaza appeal remained unchanged.
