A cyclist is in critical condition after crashing into the side of a city bus Sunday night, cops said.

The 46-year-old man was peddling east on South 5th Street in Williamsburg at approximately 8 p.m. when he suddenly struck the MTA bus heading south on Driggs Avenue, according to police.

He was taken to Bellevue hospital where he remains in critical condition.

Police said they don’t believe there to be any criminality involved in the accident.