OMAHA, Neb. (AP) — The Omaha Police Department is reminding residents to not leave their cars running unattended to warm them up during the winter mornings.

Omaha police officer Jacob Bettin said between eight hours on Tuesday morning, authorities reported 13 vehicles had been stolen because they had been left running.

Bettin says it’s easy for thieves to find cars to steal during the winter, because they only have to look for a tail pipe with exhaust coming out of it. He suggested that residents remain with their cars while they allow it to heat up or to get a remote car starter.