Police say an ambulance idling outside a New Hampshire hospital was stolen and the suspect needed to be subdued with a stun gun after being tracked down 18 miles away.

WMUR-TV reports that 26-year-old Stephen Cummings Jr. of Nashua has been charged with stealing the ambulance Tuesday afternoon. Police needed a "rolling roadblock" to get him to stop the ambulance.

Police say the ambulance was taken outside Lakes Region Hospital after its crew had left the vehicle for about 15 minutes to pick up a patient. In winter, ambulances are often kept running to keep them warm.

Stewart's Ambulance Service officials say they're reviewing their policies.

Court officials say Cummings is being held for lack of $10,000 bail. It was unclear Wednesday whether he had a lawyer.