A woman who was struck by a car on Forest Avenue near the University of Southern Maine campus Tuesday morning suffered a serious head injury, Portland police said.

The woman, identified as Brittany Weston, 23, of Portland is being treated for life-threatening injuries at Maine Medical Center, according to a statement from the Portland Police Department. Her condition was not immediately known.

Weston was attempting to cross Forest Avenue when she was struck at about 8:29 a.m. by a minivan operated Lukas Rosov, 35, of Portland, the police statement said. Weston was not in a crosswalk.

The speed limit along that stretch of Forest Avenue is 30 mph, but speed is not considered a factor in the crash.

Police spokesman Lt. Robert Martin said Rosov was given a blood alcohol test, which is standard for cases involving injury. The driver has not been cited, but police are still investigating.

Anyone that may have witnessed the accident is encouraged to contact the Portland police at 874-8532 or 874-8575.