An early Sunday morning fire at a Brooklyn religious school sent three firefighters and one civilian to the hospital with minor injuries, the FDNY said.

About 60 firefighters responded to 1462 56th Street at about 1:45 a.m. after the department got reports of flames and smoke on the first floor of a religious school, fire officials said.

They knocked the fire down in about an hour. Three firefighters and one civilian were brought to NYU Langone Hospital for minor injuries, officials said.

A neighbor said the patient lives on the second floor and is recovering nicely.

“He lives there. He’s doing OK — he just inhaled a bit of smoke and nothing more,” the man told The Post.

The cause of the fire was being investigated.