A Masonic Avenue prowler freaked his teenaged victim out, suddenly appearing in her bedroom Thursday morning.

Police say that the crime occurred at 9:45 a.m. Thursday, in a residence on the 800 block of Masonic Avenue, which is between Fell and Hayes Streets.

According to the San Francisco Police Department, the 19-year-old female victim was alone in the back bedroom of the home, which she shares "with several roommates."

The suspect, a man she believes was in his late 30s, walked into the room "and said 'Hi.'"

The victim did not recognize the suspect, police say, and expressed enough alarm that the suspect fled, an unspecified amount of stolen property in tow.

Police say that the victim was not injured in the incident. As of Friday morning, police say that no arrests have been made in this case.