Five people have been arrested during a demonstration at the Syrian embassy in London, Scotland Yard said. There have been further demonstrations at Syrian missions in other countries over the massacre of civilians in Homs, The Guardian reported.

In Cairo, Egypt, enraged Syrians again stormed their country's embassy, smashing furniture and equipment and setting fire to parts of the building.

Hundreds of demonstrators gathered at a police station a few streets from the embassy to demand the release of six Syrians who they said were detained during the protest at the mission.

In Kuwait, witnesses said demonstrators stormed into the Syrian embassy compound, breaking windows, tearing down the Syrian flag and hoisting the colours of the opposition movement.

About 150 demonstrators descended on the London embassy in Belgrave Square.

A Metropolitan police spokesman said a number of people were arrested for public order offences after the demonstration broke out at 2am. Windows were reportedly smashed at the building as the protest broke out.

Rallies also broke out at Syria's embassies in Germany, Spain, Sweden and the US, according to reports.

One protester in London told the BBC: "We don't know what message the Syrian regime is giving out with this massacre today – given the UN security council vote ... we don't really understand what they're doing. But we must stop the bloodshed in Syria."