DRUG LAB EXPLODES,KILLING FIREFIGHTER

A blast in a Bronx drug lab killed a firefighter Tuesday morning, sources said.

Emergency responders were called to the home on W. 234th St. close Irwin Blvd. for a gas spill at 6:22 a.m., authorities said. After they arrived, firefighters found a medication lab, sources said.

The house exploded around 7:30 a.m., breaking down its rooftop and sending smoke surging over the area.

"When it exploded, 3 squares away me and my child were in my flat and the whole building shook," Instagram user advocateofwordzw composed.

A FDNY force cheif injured by the blast was raced to the hospital center yet couldn't be saved, sources said.

Four cops were likewise harmed, authorities said. They were taken to North Focal Bronx Hospital facility, authorities said. Their conditions were not promptly clear.

More than 100 firefighters reacted to the blast.