There were violent scenes between protesters and police in Bristol today.
Around 60 activists surrounded Armeda House where delegates were meeting for the 27th Bristol International UAV Systems Conference. UAVs are 'drones' or unmanned aircraft used, protestors say, in the war in Afghanistan.
There were scuffles as police tried to move protesters away.
Riot police have closed off Marsh Street in Bristol while the control the remaining protesters.
There have been scuffles between Police and protesters in the centre of Bristol today. They broke out as anti-war campaigners demonstrated outside an arms conference in the city. Two roads, Marsh Street and Telephone Avenue were sealed off while the demonstrations were at their peak. The activists locked the building, refusing to let delegates out. And what had started as a peaceful protest turned when officers tried to clear it. Our reporter Robert Murphy was the only journalist there.
To find out the latest on the protest, follow Robert Murphy on Twitter.