Eleven firefighters were hurt battling a huge fire in Lower Manhattan Friday night.

The six-alarm blaze started around 7 p.m. at a mixed-use building on Murray Street between Church and Broadway.

Crews say it started on the ground floor and quickly spread up to the roof.

It took about 200 firefighters three hours to get it under control.

The Fire Department says they believe flames broke out in the duct work of a Famigila pizzeria.

They say there was ammunition in the basement, but that was never a threat since the fire traveled up and not down.

Assistant Chief Roger Sakowich of the FDNY says the injuries are all considered minor.

"More fatigue and exhaustion," Sakowich said. "The ceilings in this building are quite high, so you're opening up with large hooks, 10-foot hooks. They're pulling ceilings down. Very labor-intensive."

The fire chief also says the cool weather helped them get the blaze under control faster.

There is no word yet on the cause.