A 20-year-old man riding with his girlfriend on a motorcycle was killed Tuesday night when he collided with a van at a Garden City intersection where traffic signals had failed due to superstorm Sandy, Nassau County police said.

Police are considering the death storm-related.

The identity of the dead motorcyclist has not been released, pending notification of next of kin, police said.

Police said the rider's 18-year-old girlfriend suffered fractures to both arms. Her identity also was not released.

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The driver of the van was not injured, police said.

Police said the crash occurred at the intersection of Stewart Avenue and Washington Avenue at 8:25 p.m.

The motorcycle, a 2001 Kawasaki, was headed northbound on Washington, police said, when it collided with the 2003 Ford Econoline van headed eastbound on Stewart.

The motorcyclist was taken to Winthrop-University Hospital in Mineola, where police said he was pronounced dead at 8:50 p.m. The woman was taken to a nearby hospital.

Police said both vehicles were impounded and no criminality is suspected.