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A student driving on Loop Road struck and injured two female students Friday night before leaving the scene of the accident, Ed Callahan,director of public safety said.

University police officers found the individual’s car parked behind East Residence Quad through a description provided by student witnesses. The officers contacted the driver, but as of Monday afternoon Callahan said he did not believe any charges had been filed. He said it is possible that the student may be charged in the future.

“Most of the time you don’t want to be hasty in these accidents,” Callahan said, explaining that it is better to evaluate the facts and press charges once police officials and investigators know the details.

AMR ambulances transported the two female students to Newton Wellesley Hospital and Beth Israel Deaconess Medical Center. The student at Beth Israel is still there and is under observation, Callahan said. As of late Monday afternoon, she was in good condition, according to Morag MacLachlan, a spokeswoman for the hospital.

The student who went to Newton Wellesley suffered bruises and contusions and was released Friday evening, according to Callahan.

Waltham and university police are conducting a joint investigation and because of that Callahan declined to comment, when asked, if the driver was using alcohol or drugs at the time of the accident.

The Waltham Police Department detectives and office of community services did not immediately respond to phone messages requesting comment late Monday afternoon. An assistant for Waltham Police Chief Thomas M. LaCroix said he was no longer available for comment later in the day.

Callahan said that the two girls were walking in the street when the car struck them near the Life Sciences building. At the time, they were with between four and six friends and returning to campus after going out to dinner, Callahan said.