Apparently someone was doing a u-turn and someone else was going too fast to stop. Just by the pedestrian crossing at the top of Hampden Rd. Not sure why they closed the road though.
Because one of the crashed cars was sitting in the middle of the road and there were two fire engines, two police vehicles and a couple of ambulances attending. I think the car doors were jammed shut and the occupants trapped.
I'm more concerned about the speed of the other vehicle to be honest... Especially given the proximity to the pedestrian crossing (which is a death trap).