Two on-campus robberies of University of Minnesota students over the weekend left both victims injured, and authorities announced the arrests of two teens in one attack while they keep looking for others responsible for each crime, university officials said Monday.

In the first incident, five or six males ambushed a male student shortly after 10 p.m. Friday as he walked south of the mechanical engineering building in the 100 block of Church Street SE., according to a campus notification sent by university police.

The victim told authorities that the suspects followed him to the nearby light-rail station. He said his attackers kicked and punched him. He was treated at the scene for minor injuries.

The second crime occurred about 8 p.m. Sunday near the Carlson School of Management and the Wilson Library on the West Bank campus.

Three men assaulted a male student and took his phone, police said. The victim was treated at the scene and taken to a hospital, then released.

The two crimes were committed by different suspects, police said. Anyone with information about either incident is asked to contact police at 612-624-2677.

The university released descriptions of all but one of the suspects, and they lacked specific details about their appearance.