Two women were beaten and then sexually assaulted in separate incidents on the city’s south side, police said.

The attacks happened near South Sixth Avenue and West Veterans Boulevard on June 27 and July 8, said Sgt. Pete Dugan, a Tucson Police Department spokesman.

Police released a composite sketch Thursday of the assailant connected to the first incident. Investigators cannot say if the same man is connected to both assaults, Dugan said.

Investigators are asking anyone with information to contact 911 or 88-CRIME.

The first attack happened about 11 p.m. June 27 when a woman was walking in the 3500 block of South Sixth Avenue, Dugan said.

An assailant approached the woman from behind, grabbed her by the hair and pulled her behind a business into an alley, said Dugan. The man punched the woman multiple times before sexually assaulting her, he said.

The victim described her attacker as a man in his 30s. He was about 5 feet 8 inches tall and weighed 150 pounds. He had short black hair and brown eyes.

On July 8 at about 6:30 a.m., a woman was walking down an alley in the 3400 block of South Sixth Avenue when she was struck from behind by a man, Dugan said.

The man struck the woman in the face several times, causing serious injuries. The woman then was sexually assaulted, said Dugan.

The assailant was described as about 6 feet tall, and was seen riding a bicycle, Dugan said.

The police spokesman advised that people remain aware of their surroundings and report suspicious activity to police immediately. When walking, it is safest to walk with someone in a lighted, populated area, Dugan said.