A VA hospital employee and a retired worker were struggling over a gun in a break room Monday when the firearm went off, leading to the employee's shooting and the retiree's arrest, police in Dayton, Ohio, said.

Paul Burnside, 61, was shot once in the ankle, said Police Chief Richard Biehl. Neil Moore, 59, was taken into custody after seeking psychiatric treatment at a hospital a few miles away, Biehl said.

The men apparently knew each other, but it was too soon to determine what led to the shooting, Biehl said.

The shooting, during the lunch hour in the basement of the hospital's main building, caused a lockdown as FBI agents searched the complex. Authorities also blocked roads leading to the hospital complex. - AP