Police are searching for a man they say pulled a gun on an MTA bus driver during an argument in Castle Hill.

Authorities say he approached the 52-year-old man around 11 p.m. on Nov. 17 and asked him to stop the bus.

The man and the driver began arguing, and the man took out a gun. Police say he ran from the scene toward Seward Avenue. The driver was not injured.

Authorities say the suspect was last seen wearing a black sweatshirt and sneakers with light blue jeans.

Anyone with information is urged to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477).