Police ended a standoff about 6 p.m. Tuesday with a mentally challenged man who wielded a hammer and knife when they tried to remove him from his father's vacant house.

Police, some wearing gas masks, removed the 26-year-old man in handcuffs. He was leaning back against officers as they escorted him into a waiting ambulance.

Illinois State Police starting at about 4 p.m. Tuesday tried to talk the man into coming out of the house at 1416 N. 54th St. in Washington Park, Police Chief David Clark said. The man had barricaded himself inside.

"The house is believed to be the suspect's father's. The suspect is mentally challenged," Clark said. "Officers tried to get him out, and he pulled the knife and the hammer. Officers then left."

Washington Park police called in the state negotiator and tactical unit to try to bring the man out peacefully.