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PHILADELPHIA (CBS/AP) — Police are seeking the driver of a minivan that fled the scene after colliding with a motorcycle in Philadelphia, killing the operator and critically injuring his passenger.

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Officials say the minivan was heading west on Martin Luther King Jr. Drive and was making a left turn when it struck the eastbound motorcycle just after 2:30 a.m. Sunday.

Police say the 48-year-old motorcycle operator was pronounced dead at Penn Presbyterian Medical Center. The 37-year-old woman who was a passenger on the motorcycle was listed in critical condition with severe head trauma.

Officials say the minivan driver fled the location, leaving the vehicle behind.

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Both vehicles were towed by authorities for inspection and evidence.

No arrests were immediately reported.

(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)