DIX HILLS, N.Y. (CBSNewYork) — An off-duty NYPD officer was killed early Monday in a crash on the Long Island Expressway.

Another driver was also injured.

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Officer Joseph Pritchard, 30, was stopped in his 2008 Dodge pickup truck for an unknown reason in the westbound right lane of the expressway at 2:23 a.m. Monday, Suffolk County police said. His pickup truck was struck from the rear by a 2001 International box truck belonging to Barakat Trucking, and driven by Eduardo Garcia, 34, of the Bronx.

Both vehicles caught fire after the accident, police said.

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Pritchard, of North Babylon, was pronounced dead at the scene by a Suffolk County Medical Examiner’s Office physician assistant, police said. Garcia was taken by Dix Hills fire crews to Huntington Hospital in Huntington with non-life-threatening injuries, police said.

NYPD officials Monday night were not sure why Pritchard was stopped in the right lane. The NYPD said flags will be at half-staff at the Midtown South Precinct where he worked.

Police did not indicate whether any charges or tickets would be issued in connection with the crash.

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