POLICE have vowed that more arrests will be made after violent post-referendum demonstrations took place in Glasgow.

Eleven people have been arrested so far following the trouble on Friday night in George Square.

Officers are scouring social media and CCTV in a bid to track down anyone who may have been involved in the violence.

The incident, which has been condemned by thousands of city residents and politicians, kicked off after loyalists bearing Union flags clashed with pro-independence supporters.

Around 700 people were in the square and police - some mounted on horses - were called to separate rival groups.

Many marched down St Vincent Place as police followed. They later gathered in George Square again singing Rule Britannia and a flare was let off. Police formed a human barrier to block off the route to Buchanan Street and contain people in the square.

Chief Superintendent Andy Bates said: "An investigation into Friday night's disorder has begun and an incident room has been set up at Glasgow City Centre Police Office, staffed by officers dedicated to identifying and arresting anyone involved in the ugly scenes witnessed across the world.

"We have already secured valuable CCTV and other evidence which I am confident will lead to further arrests.

*Investigations are continuing into a fire near The Herald offices on Friday night.

CCTV shows two men standing beside a large metal generator in Renfrew Court, near the Flying Duck nightclub.

The men disappeared from the scene but shortly afterwards flames emerged from the bottom of the generator.