Around two dozen demonstrators gathered outside the Russian Embassy in London on Thursday afternoon to protest Moscow's use of airpower to back the Syrian government in its siege of the city of Aleppo.

Protesters threw hundreds of mannequin limbs, representing the injuries suffered by the Syrian people, in front of the embassy, accusing Moscow of committing untold atrocities in Syria's largest city. Two activists chained themselves to the embassy gates.

Protester John Dunford, who chained himself to the gates, says he's protesting "the use of cluster munitions and bunker busters and other terrible horrors that the Russian government has been a part of in Syria. So I'm locked here to make this point."