Residents of a UW-Madison fraternity house escaped injury early Friday morning when fireworks were set off in the basement of the house.

A lawn mower with gas in the tank was also in the basement.

The fire call came in at 2:45 a.m. Friday at 627 N. Lake St., according to a news release from the Madison Fire Department.

City assessor records show the building is the Sigma Alpha Epsilon fraternity.

"Residents were setting off fireworks inside the basement of their fraternity house and a box started to smolder," said MFD spokeswoman Lori Wirth.

A resident put the fire out with an extinguisher.

"Engine 1 firefighters reported no other fire, but found a lawn mower with gas in it in the basement," Wirth said. "The occupants were told to remove the lawn mower on the spot."

No damage estimate was given and no injuries were reported.