St Joseph fire investigators on Friday made it official: fireworks caused a fire Thursday that destroyed a duplex at 2122 South 11th Street.

St Joseph Fire Department Inspector Rob Blizzard says the blaze caused an estimated 60-thousand dollars damage.

There were no injuries. Two families were displaced.

Blizzard says even though the city bans any firework that “goes up or goes boom,” the cause is still considered accidental.

Fire crews entered the attic of the duplex to fight the fire on the roof, but quickly pulled out as the roof started to collapse. Crews were able to rescue a family cat from the debris.