A woman was in critical condition after she ended up under a train at the Utica Avenue subway early Sunday morning, cops said.

The victim was found underneath a subway car on the A/C line at about 6:45 a.m., according to police. It was not immediately clear how she ended up on the tracks, officials said.

Trains went express past the Utica Avenue station at the time of the incident, an MTA spokesperson said. Regular service was resumed at around 8 a.m.

The victim was taken to Kings County Hospital in critical condition. Cops said the investigation is ongoing.