PELHAM, N.H. (CBS Connecticut/AP) — A fireworks explosion ignited on a home’s back deck set it ablaze Tuesday night and filled it with smoke, injuring at least nine people, police said.

When police officers and firefighters arrived at the home around 7:30 p.m., there were lots of fireworks in and around it, the police department said.

Firefighters put out the blaze.

WMUR-TV in Manchester reported that the fireworks ignited on the home’s back deck.

The nine injured people ranged in age from infant to adult. Two children were taken to Boston hospitals for treatment.

“The extent of their injuries was moderate to minor, and the two pediatrics were severe,” Pelham Fire Chief James Midgley told WMUR.

Neighbor Richard Souza, who lives on a street behind the home in Pelham, a town of about 13,000 residents an hour drive south of Concord, said the people who live in the home set off fireworks every year for July Fourth.

He said there seemed to be a lot of fireworks going off Tuesday night and soon after fire trucks roared into the neighborhood and firefighters turned their hoses on the home.

“It sounded like they were squirting the house down,” Souza said.

Another neighbor saw a “mushroom cloud” after the explosion.

“I heard it sounded like a million gunshots, and I thought maybe they were testing it, and then I saw the huge mushroom cloud and I was like, ‘Oh man, that can’t be good,'” Taylor Jackson told WMUR.

A medical helicopter flew in to take an injured person away, he said.

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