BEVERLY, Mass. -- A man stole an ambulance and led police on a wild ride through several North Shore towns Friday night.

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Police said William Guzman, 38, jumped into the driver's seat of the ambulance and drove off from Beverly Hospital, where paramedics had left the keys in the ignition.

During the chase through three towns, the ambulance struck a least five cars, including some police cruisers that tried to block it.

At one point, the ambulance went the wrong way down a one-way street.

"We're not exactly sure why he did it," said Salem police Lt. Scott Englehardt.

Witnesses said they saw the ambulance speed and swerve through the chase.

Police eventually caught up with Guzman in Lynn, who fled on foot after the ambulance got stuck in traffic, police said.

Guzman was the only one injured.

"Luckily, no one else was hurt in all the crashes that ensued," said Englehardt.

Guzman faces several charges and the Lyons Ambulance company is expected to be cited for leaving the keys inside.