LINCOLN, Neb. (AP) – Authorities have released the name of a man killed by a carbon monoxide buildup at a mobile home in north Lincoln.

On Thursday police identified the man as 57-year-old Ruben “Javier” Moreno Campos.

Police and medics were called to the home around 3 a.m. Wednesday. Fire Battalion Chief Jim Bopp has said a first responder’s carbon monoxide detector went off while there. Bopp also said Black Hills Energy workers blamed the deadly gas buildup on a water heater venting problem.