A pedestrian is in hospital after a crash involving three cars, with one of the drivers fleeing the scene.
Greater Manchester Police said three vehicles were driving along Yorkshire Street, Rochdale, at about 23:00 GMT on Friday when the man was hit trying to cross the road.
The 42-year-old was seriously injured, the force said.
Two men were arrested at the scene on suspicion of causing serious injury by dangerous driving, while a search is under way to find the third driver who made off.
Two of the cars suspected to have been involved were a blue Mercedes and a silver Mini Cooper, police said.
Anyone who witnessed the crash, or has footage from the area at the time, is urged to contact Greater Manchester Police.