Chicago police are investigating the case of an ambulance stolen from the grounds of the University of Chicago hospitals on the city’s South Side.

At about 1:30 this morning, police received a call about a private ambulance being stolen on the 5700 block of South Maryland Avenue, News Affairs Officer Jose Estrada said.

The emergency vehicle had been left running in the ambulance zone of the hospital, and an unknown offender jumped in and stole the ambulance, Estrada said.

No one was in the ambulance at the time. Police said later Saturday that they were still investigating the case.

gpratt@tribune.com

Twitter: @royalpratt