Five prison guards have placed on leave after two convicted killers escaped a high-security Arkansas unit by wearing guard uniforms made at the prison and leaving in a car that had been left for them.

Correction Department spokeswoman Dina Tyler said Monday afternoon that the two men who escaped Friday evening were spotted in Missouri on Saturday and later in Michigan, where one of them has relatives.

Tyler said the five guards are on unpaid leave while the escape of Jeffrey Grinder and Calvin Adams is investigated. The five officers had been guarding the entry and exit points of the prison.