A man was allegedly assaulted Tuesday while working on a duplex in midtown.

Capt. Jeff Wilson with the St. Joseph Police Department said officers responded to the 2500 block of Olive shortly before 10:30 p.m. in reference to a burglary.

Wilson said a 45-year-old man claimed he was doing some maintenance on the duplex and confronted several people who he felt may be entering the building illegally.

“During the course of this he was struck in the head with an unknown object,” Wilson said. “He stated it could have been a pipe wrench or hammer.”

The suspects allegedly fled the area. The man sustained a laceration to the head and was transported to Mosaic Life Care where he was treated and released.

Wilson said detectives have several persons of interest in the case. The investigation continues.