A Toronto man has been arrested in connection with the sexual assault of a teenage girl near Chinatown on Friday, Toronto Police said.

According to police, a man heading westbound on Dundas St. W. began following a teenage girl when she got off a streetcar at Spadina Ave. on Friday afternoon. He then approached her from behind and sexually assaulted her, police said.

Investigators say the man then assaulted another female, but did not provide details about that assault.

A witness called police, who arrested the man at the scene.

Parviz Ahmadi, 27, has been charged with two counts of sexual assault, and failing to comply with probation.

He is scheduled to appear in court on September 3.

Police are concerned that there may be more victims.