TEHRAN, Iran, (AP) – About 200 students threw rocks and firecrackers at the British Embassy on Sunday, calling for the expulsion of the country’s ambassador because of the standoff over Iran’s capture of 15 British sailors and marines.

Police prevented any of the protesters from entering the embassy compound, although a few briefly scaled a fence outside the compound’s walls before being pushed back, according to an Associated Press reporter at the scene.

The protesters chanted “Den of spies” and called for the British ambassador’s expulsion.

Britain’s Foreign Office said there had been no damage to the compound.

“There is a demonstration taking place at the embassy,” said a British Foreign Office spokeswoman in London, speaking on condition of anonymity in line with government rules. “No damage has been done to the embassy.”

Britain and Iran are at a standoff over the 15 seized sailors and marines. Britain said they were in Iraqi waters when seized, but Iran has contended the Britons entered its waters illegally.