Eyewitnesses say they saw a tall skinny man, wearing a black trenchcoat and a mohawk haircut, walk into the cafeteria carrying a large gun. He apparently fired several shots...Link (Thanks, Mike!)
Montreal police confirm that there is at least one suspect they say has been "neutralised." Television images showed police officers dragging a bloody body out of the main doors of the building.
Update: Montreal Metroblogging has a first-hand account of the shootings.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.