OMAHA, Neb. (AP) — Omaha police say a man who displayed bizarre, erratic behavior before his arrest is now in a hospital in critical condition.

Police say officers were called to a south Omaha address Friday afternoon by witnesses who reported an intoxicated man with self-inflicted injuries overturning patio furniture and possibly suffering from a medical condition.

Officers who arrived found 50-year-old Patrick Ennis standing over a stair railing, clinching his fists. Police say he first obeyed commands to put his hands behind his back to be handcuffed, but then resisted and struggled with officers.

Once handcuffed, officers said Ennis began having trouble breathing. Police say officers removed the handcuffs and began CPR until paramedics arrived.

Police say an internal police investigation is being conducted.