Three people were hurt Sunday night when someone detonated illegal fireworks in a North Long Beach neighborhood, fire officials said.

One person’s injuries were serious enough that fire crews took them to the hospital for treatment, Long Beach Fire Department spokesperson Brian Fisk said.

Few details were immediately available, but Fisk said the department responded to a call for help at about 11 p.m. Sunday, July 4 in the 4900 block of Grisham Avenue, which is just north of Bixby Knolls. The LBFD said they do not know how the illegal fireworks were obtained. All fireworks are illegal in Long Beach.

Fisk said fire investigators are trying to determine if the injured parties were responsible for lighting the fireworks or were “collateral damage from others lighting them.”

The department did not reveal the patients’ age, gender or extent of their injuries. The investigation is still ongoing.

Officials couldn’t immediately provide details on whether anyone else was injured by fireworks over the Fourth of July holiday or provide numbers on how many citations were handed out for fireworks violations.