Police seized almost $30,000 worth of illegal fireworks Monday night and arrested three people accused of participating in selling them out of a makeshift storefront in North Long Beach, authorities said.

City officials stood in front of stacks of the confiscated merchandise at a press conference Tuesday and warned residents against buying or shooting off similar fireworks.

“I don’t think there’s any city where these types of fireworks are legal,” Long Beach Police Chief Robert Luna said. He underscored that all fireworks are illegal in Long Beach even if they’re permissible elsewhere.

Long Beach police have been trying to root out fireworks leading up to the 4th of July. Enforcing fireworks laws can be difficult because officers have to witness the violation themselves to arrest someone for possessing or lighting fireworks, according to Luna.

The penalty can be up to a $1,000 fine and six months in jail.

This year, police have placed extra emphasis on finding the sellers supplying the pyrotechnics, the chief said.

An anonymous tip led to Monday night’s bust, he explained.

Around 8 p.m., officers served a search warrant on a home in the 1800 block of East 57th Street, according to Luna.

In the garage, they found about 5,000 pounds of fireworks and a makeshift storefront where they were being sold, police said.

That glut of fireworks was “a very large amount for one single bust,” Long Beach Mayor Robert Garcia said as he congratulated police and firefighters on their work.

Officers arrested two men and a woman related to the stash, police said. Family protective services also took custody of four kids at the home — ages 5, 8, 10 and 17 — according to Luna.

One man, 24-year-old Long Beach resident Darius Bo, was arrested on suspicion of possession of dangerous fireworks and held in lieu of $20,000 bail, according to Luna.

The second, 36-year-old Los Angeles resident Armand Moore, was arrested on suspicion of possession of PCP and held in lieu of $30,000 bail, police said.

The woman, 29-year-old Long Beach resident Sreypeur Say, was arrested on suspicion of possession of dangerous fireworks and also held on $20,000 bail.

Moore and Bo are both documented gang members, according to police. People arrested for selling fireworks in Long Beach are often gang members, Luna said, in front of a row of cameras at the press conference.

“So it’s very important for the community, the viewers, to understand that when they purchase these fireworks — these type of fireworks behind me — from unauthorized sources, they are essentially putting money in the pockets of street gangs, supporting their illicit activities,” Luna said.

Using fireworks is not only illegal, it’s dangerous, according to the chief.

Last year on the 4th of July, a 17-year-old setting off fireworks at Pacific Coast Highway and Lemon Avenue had his hand “partially amputated” in an explosion, Luna said.

An hour before that injury, police had written the boy’s grandmother a $1,000 ticket related to fireworks, Long Beach Fire Department Deputy Chief Rich Brandt said.

“It’s responsible parents that we need as well, not just our efforts but all of our community efforts,” Brandt said.

The Long Beach Fire Department has also doubled down on its campaign to tell people fireworks are illegal, according to Brandt. That effort includes billboards, signs, social media posts, fliers, posters and yard signs.

“We’re not going to put up with this,” Brandt said.

Monday’s arrests were the latest in a series of fireworks busts made by Long Beach police officers, according to the department.

In one case, officers arrested a man on June 17 after finding a large amount of fireworks, cash, drugs and a stolen handgun in his home, police said.

In another instance on June 12, an online advertisement led officers to a Bixby Knolls address where they found $2,500 worth of “high powered” fireworks and arrested three men, police said.