ANN ARBOR, MI - One in a series of home invasions in Ann Arbor last week was reported as a rape attempt, police confirmed Thursday, April 12.

Police believe the same man entered three Ann Arbor homes through unlocked doors within a five-hour period late Thursday, April 5 and early Friday, April 6.

In two instances, the man ran off when confronted, but in another, the victim told police she was asleep on her couch when the intruder assaulted and attempted to rape her, Ann Arbor Detective Sgt. Earle Fox said.

Police were called about 2:58 a.m. Friday, April 6 to the 400 block of South Seventh St.

The resident, a woman in her 40s, told police a masked man shook her awake and then told her to bend over, Fox said.

The woman fought the man off, bit him and screamed, Fox said. The man fled as a family member ran into the room. The woman was not injured.

Prior to the reported rape attempt, police were called at 11:26 p.m. Thursday, April 5 to a home in the 1200 block of Patricia Ave. after a resident awoke to the sound of footsteps in her home, police previously said. The suspect fled when confronted.

The last of the three home invasions was reported at 3:50 a.m. in the area of Newport Road and Miller Avenue, police said. The resident awoke to the sound of someone entering her home, but the man fled when confronted.

The suspect is described as a white man between the ages of 20 to 30 years old, about 5-foot-6 to 5-foot-9 in height with a small build, Ann Arbor police Detective Sgt. Craig Martin previously said.

The man was described as wearing dark clothing, with a mask in the second incident - one was recovered from the scene. He was described as having his face covered in the third incident, as well.

Police were continuing to investigate all aspects of the three incidents, Fox said. No assaults were reported in the two other connected break-ins.

Without interviewing the man, police said they can't definitively comment on the man's intent. They hope to do just that, however.

"This is a very serious crime and we are devoting significant investigative resources to resolving this," he said.

In the meantime, police urge residents to lock their doors, and immediately report any suspicious activity to police without delay.

Those who see any suspicious activity are asked to call 911. Those with information on the incidents are asked to call the Ann Arbor police tip line at 734-794-6939 or email tips@a2gov.org.