PHILADELPHIA (CBS) — Police are searching for a man who stabbed another passenger on a SEPTA bus overnight in West Philadelphia.

It happened around 3:30 a.m. Wednesday at 46th and Market Streets on a Market-Frankford Line night owl bus.

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Authorities say a man was stabbed in the side of his forehead and his attacker jumped off the bus and ran away.

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The victim suffered a small cut on the side of his forehead and refused treatment from medics.

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It wasn’t immediately clear what type of weapon was used in the stabbing or what led to the attack.