A driver was airlifted to hospital after a crash that closed the 57 Freeway at Diamond Bar early Thursday.
Two vehicles were involved in the smash, in which a car is reported to have overturned and struck a pole at around 1:13 a.m. north of Sunset Crossing Road, a California Highway Patrol spokesman said.
It is unclear if the two vehicles collided first or if the second vehicle collided after the first vehicle overturned.
THE driver of the overturned was trapped in the vehicle, and was given emergency treatment before being taken to the hospital. There is no information on the extent of their injuries.
The sig alert was cancelled at 3:42 a.m.
