PITTSBURG -- Three people were arrested Thursday in a sting that netted more than a ton of illegal fireworks, a fire official said.

Pittsburg police and investigators from the Contra Costa Fire Protection District caught up to Jose Francisco Hernandez, 22, of Richmond; Ivan Medina, 26, of Oakley; and Luis Amado Medina, 30, of Crown Point, Indiana, on Thursday, Fire Marshal Robert Marshall said.

The investigation probed Craigslist postings advertising fireworks for sale. Police contacted the advertiser and set up a meeting Thursday morning on Century Boulevard in Pittsburg, Lt. Ron Raman said.

"We arrested him there, and subsequently we gathered information that led us to the other two, and to the fireworks," he said.

A truckload of seized fireworks from an Antioch storage facility after three suspects were arrested for selling the fireworks online, at Fire Station 84 in
A truckload of seized fireworks from an Antioch storage facility after three suspects were arrested for selling the fireworks online, at Fire Station 84 in Pittsburg, Calif., on Friday, June 27, 2014. (Dan Rosenstrauch/Bay Area News Group)

In all, more than 2,500 pounds of illegal fireworks were confiscated in Antioch, Marshall said.

"This will put a small dent into the use of illegal fireworks," he said. "We're especially concerned with the use of (them) in light of dry conditions. We traditionally have a lot of fires in the weeks leading up to the Fourth of July holiday. We expect this to be a bad year as it is. We don't need fireworks on the streets."

Fireworks are illegal in Contra Costa County and nearly all Bay Area cities. Officials say they are especially dangerous this year because of dry conditions created by the state's drought.

The suspects are expected to be charged with felony and misdemeanor charges that include advertising and sale of fireworks without a license, transporting fireworks not registered by the California State Fire Marshal, storage of fireworks without a permit, possession of dangerous fireworks without a permit, and possession of more than 100 pounds of dangerous fireworks.

All three were taken to the County Jail in Martinez, where they each were being held in lieu of $20,000.

Contact Rick Hurd at 925-945-4789 and follow him at Twitter.com/3rderh