Dallas police looking for suspect accused of raping at least 3 women

DALLAS, Texas (KTRK) -- Dallas police are urging people to be extra vigilant.

They said a serial rapist may be on the loose.

Police released a sketch of who they believe is a young man or teenager who has raped at least three women in a month in three different apartment complexes.

The most recent incident involved a mother who was attacked on Tuesday.

Police believe the suspect knocks on doors, then offers work or asks for a donation.