A five-alarm fire tore through a commercial building in Queens Saturday morning, trapping several workers in a smoky office until hero firefighters plucked them out through smashed windows.

"I thought I was going to die," said Laura Sarmientos, 28, who was trapped in the Astoria building and was later treated for smoke inhalation. "There was a lot of smoke."

The blaze erupted shortly after 11 a.m. on 37th Avenue near 31st Street. It quickly escalated and smoke clogged the exits of the 5-story building.

Several workers for Vantage Properties, which invests in residential and retail properties, found themselves trapped on the third floor.

"We couldn't get out," said Denise Jonsson, 22, who works in the company's leasing department. "They had to break the windows to get us out."

No one was injured in the fire. Five people refused medical attention at the scene and one firefighter suffered minor burns.

Firefighters were still trying to put out the fire two hours after it began.