A jewelry store owner in Oak Lawn, IL, was beaten during a robbery at his business on Monday.

They entered Ramallah Jewelry by cutting through the wall via a vacant storefront next door, ABC 7 reports.

The owner was just opening the store when the men came through the wall “with a crowbar and possibly guns,” according to the report. Police said one of them hit him with a blunt object. He received treatment on the scene for minor injuries.

They broke display cases and took items including necklaces, bracelets and stones.

Watch a news video about the crime: