Canning Street Runners

I'm not sure what is going on this morning, but there is a row of police vans packed with officers sitting on Canning Street. It looks rather like they are awaiting the signal to go and raid something, but I have no idea what. There seems to be a fairly senior officer present (wandering up and down the line of vehicles chatting through the windows) so it might be important.

I'll watch the media later for clues...