A teen is critical after being hit by an ambulance while crossing the street in Far Rockaway, cops said Sunday.

The 19-year-old woman was walking in a crosswalk on Seagirt Avenue near Beach 26th Street in Queens just before 11:30 p.m. Saturday when she was hit by an FDNY ambulance heading west on the road, police said.

EMS rushed the woman to St. John’s Hospital where she is in critical condition for head trauma, according to authorities.

Police said no arrests or tickets have been issued and the investigation is still ongoing.

It was unclear if the ambulance was heading to call at the time of the accident. FDNY did not immediately have any additional details.

The incident is under investigation, an FDNY spokesman said.