CAIRO, Feb 4 (Reuters) - A crowd of Syrians stormed the Syrian embassy in Cairo smashing furniture and equipment and setting fire to parts of the building in protest over the latest bloodshed in the country, an embassy official and a witness said on Saturday. Rallies also broke out outside Syria's embassies in Britain, Germany and the United States after human rights activists reported more than 200 people were killed in shelling by government forces in the city of Homs.