OAK PARK, ILL. ? Six inmates escaped Saturday by overpowering a guard at the understaffed county jail, authorities said. Three were captured Sunday.

The men escaped late Saturday from a special unit at Cook County Jail for inmates with disciplinary problems.

One inmate threw hot water from a shower on the guard and held him at bay with a homemade knife, then handcuffed the guard and put on his uniform, officials said.

That inmate was caught after letting the others out.

Three inmates, Arnold Joyner, 43, and David Earnest, 38, and Michael McIntosh, 30, were arrested Sunday.

The three at large Sunday were Franciso Romero, 23, Eric Bernard, 22, and Tyrone Everhart, 28.