MINNEAPOLIS (AP) – A Kansas sheriff says four inmates who escaped from his jail were armed with homemade knives and overpowered guards after complaining about a broken water line in the holding cell area.

Two of the four were still at large Wednesday night, including a convicted murderer. They’d been transferred to the Ottawa County jail in January to help alleviate prison overcrowding.

Sheriff Keith Coleman tells The Salina Journal that the inmates overpowered the guards, opened the cell doors and got outside. He says the guards suffered only minor injuries.

The inmates escaped around 5 a-m. One was quickly apprehended and another was captured late Wednesday afternoon in North Platte, Nebraska.

Prison officials say the jail in Minneapolis, Kan., had passed an inspection before it was allowed to house prison inmates.