Police are appealing to the public to help identify a man who is accused of committing bizarre sexual assaults against unknowing victims — he creeps up behind them and sniffs their butts.

According to reports, a man was caught on surveillance footage at a UK grocery store intensely smelling a man’s bottom as he bent over in a food aisle. And this isn’t his first offense–police say he’s committed the act at least twice at the same store.

Police are treating the incident as sexual assault and hope the surveillance photo will lead to an arrest.

Via Metro