PITTSFIELD — A city man is facing an aggravated assault charge for allegedly striking a woman with his car, causing serious injury, and abandoning her in the roadway.

Alfredo A. Osorio, 25, of Pittsfield, was arrested Thursday, after a two-day investigation by Pittsfield Police. He was arraigned Friday.

The victim, a 20-year-old city woman, was found lying on Pecks Road around 2 a.m. Tuesday, police said.

She told police she asked the man for a ride home from the parking lot of the Cumberland Farms on First Street and called 911 after he began driving erratically. She got out of the car and began talking to the 911 operator, which angered the man, who then "ran her over with the car" and fled, according to the police report.

The woman was taken to Berkshire Medical Center with serious internal injuries, the report said. Her condition was not available late Friday.

Detectives used video surveillance from Cumberland Farms to identify and find Osorio.

Osorio told a neighbor he had been in an accident that night, according to the report, and he told police he had given a woman a ride to Pecks Road.

Osorio pleaded not guilty in Central Berkshire District Court on Friday to charges of aggravated assault and battery with a dangerous weapon, and leaving the scene of an accident involving personal injury.

He was released on personal recognizance and ordered to stay away from the woman.

Osorio's next court appearance is Oct. 31.

Amanda Drane can be contacted at adrane@berkshireeagle.com, @amandadrane on Twitter, and 413-496-6296.