NEW YORK (CBSNewYork) -- Police are investigating another violent attack in the subway system.

This one happened around 4 p.m. Tuesday at the Union Square subway station.

Police say a man, believed to be about 25 years old, slashed a 45-year-old man on the neck after they got into an argument on the L train platform.

The victim was taken to a local hospital and is expected to be OK.

Police are searching for the attacker.