University police issued two crime alerts to the University community Tuesday.

The first alert involved a University student who was assaulted and robbed in Dinkytown.

On Sunday night the student parked his car on 12th Avenue Southeast and started walking in the direction of Sanford Hall when two boys approached him and hit him in the head with a rock, said Greg Hestness, the chief of police for the University.

“There wasn’t even a demand before he was struck,” Hestness said.

Hestness said the student was hit in the back of the head and also on the forehead, above the eye, which required stitches.

During the assault, the student’s wallet was stolen.

According to the alert, after the attack the student walked to Sanford Hall and police were called.

At this time there are no suspects in custody, Hestness said.

University police also have issued an alert for the West Bank because of two other incidents that occurred between April 23 and May 1, said Steve Johnson, deputy police chief for the University.

About 11 p.m. April 23, a University student was approached near Fourth Street South by three or four 14- to 18-year-old male assailants.

The suspects ran to her and grabbed her purse, but she started screaming, threatening to call police.

The suspects ran and hid behind the Barbara Barker Center for Dance, where she saw them watching her. She ran into the Carlson School of Management and called police.

The second incident happened about 7 p.m. Monday outside Wilson Library.

A University student was adjusting her iPod when three boys, estimated to be between the ages of 13 and 15, ran to her and kicked her in the calf before taking her iPod.

These two incidents on the West Bank might be related because there are similar suspect descriptions, Johnson said.

There is another thing in common.

“In both cases they targeted something they wanted,” Johnson said.