NEW YORK (CBSNewYork) – More than a dozen people were injured, two critically, when a fire broke out Wednesday morning in the Bronx.

Firefighters responded around 6:30 a.m. to a three-story building on Holland Ave. in the Olinville section.

Fire officials said the flames started on the ground floor.

Some people were forced to jump out windows to safety. In all, 15 people were hurt.

A firefighter jumped onto the roof of a car to help one of the victims who jumped out a window get to safety.

One of the victims went into cardiac arrest and had to be revived by emergency responders.

Witnesses say the building was essentially occupied by one large family.

There’s no word on what caused the fire.