LINCOLN, Neb. (AP) — Lincoln officials say many landlords aren’t aware of a carbon monoxide detector requirement the city adopted a year ago.

The policy makes carbon monoxide detectors mandatory in any building with three of more units and an attached garage, fireplace or gas stove.

Eighty-year-old Dale Moyer died last month after accidentally leaving his car running in the garage of his building. Fire Inspector Mike Wright says Moyer’s death isn’t an isolated incident.

Wright is the only inspector responsible for all apartments in the city. He says enforcing the code is difficult since there are thousands of units and only eight fire inspectors.

Wright says buildings are only inspected if the city gets a complaint or the building is sold to a new owner.