An empty black SUV left running for more than an hour caused a bomb scare on the Upper West Side around noon Sunday.

The bomb squad rushed to the BMW parked in front of the Museum of Natural History on West 77th Street, smashing two windows before realizing it was harmless, a NYPD spokesman said.

The vehicle's windows were blacked out with a paisley pattern and the interior dashboard was blocked with a panel, raising the suspicions of police just a week after the Times Square bombing.

The owner of the car, a BMW employee testing a 2011 SUV prototype, responded to the scene and eventually drove the vehicle away, said Tom Kowaleski, a BMW spokesman.

BMW adds the camouflage to prototypes to prevent competitors from steeling trademark material, Kowaleski said. As for why the car was left running, the employee apparently thought he had hit the off switch buried under the dashboard cover, but the super quiet engine didn’t let him know otherwise, he said.

President and CEO of Nassau University Medical Center Thomas Stokes explains the problems caused by the aging infrastructure within the hospital. Newsday Associate Editor Joye Brown reports.  Credit: Newsday/Kendall Rodriguez

Inside look at NUMC's aging infrastructure President and CEO of Nassau University Medical Center Thomas Stokes explains the problems caused by the aging infrastructure within the hospital. Newsday Associate Editor Joye Brown reports.

President and CEO of Nassau University Medical Center Thomas Stokes explains the problems caused by the aging infrastructure within the hospital. Newsday Associate Editor Joye Brown reports.  Credit: Newsday/Kendall Rodriguez

Inside look at NUMC's aging infrastructure President and CEO of Nassau University Medical Center Thomas Stokes explains the problems caused by the aging infrastructure within the hospital. Newsday Associate Editor Joye Brown reports.

SUBSCRIBE

Unlimited Digital AccessOnly 25¢for 6 months

ACT NOWSALE ENDS SOON | CANCEL ANYTIME