Gunfire struck a Bronx bus filled with dozens of passengers early Sunday morning, though no one was injured.

An unknown gunman fired a few times at the BX36 bus at around 4:30 a.m. near the intersection of 174th Street and Bronx River Avenue before fleeing, police said.

There were approximately 40 people on board, according to the MTA.

A police spokesman said he was unsure how many bullets were fired, or what kind of damage there was to the bus.

Cops had no suspects as of last night, and were still investigating.