A man riding a motorcycle collided with another vehicle under unclear circumstances

Tucson, AZ.- A motorcyclist was seriously hurt in a collision with a vehicle in Tucson on Monday afternoon, according to the Tucson Police Department.
The two-vehicle accident happened in the area of Campbell and Irvington avenues at about 4 p.m. December 9.
A man riding a motorcycle collided with another vehicle under unclear circumstances.
According to Tucson police, the motorcyclist was taken to a hospital and his injuries were described as life-threatening.
No further details were released.
The accident is under investigation.