Press Association: Three environmental activists demonstrating during a visit to parliament by the Canadian prime minister, Stephen Harper, have been arrested, say police.
Environmental campaigners against tar sands, a form of fuel that produces more emissions than conventional oil, have posted a video showing them on the roof of parliament, with a statement saying they wanted to disrupt the premier's address to MPs and peers.
The Love Canada Hate Tar Sands site said: "We have entered parliament to interrupt...