AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREGift Box shows no rust in San Antonio Stakes win at Santa Anita Amormino added that cell phone signals could trigger the caps, so a “no cell phone” zone was ordered around the recovery site. A blasting cap is normally used as a detonator when connected to a larger explosive, such as TNT, but divers hadn’t found any evidence of stronger explosives. By itself, this type of cap is capable of causing an explosion equivalent to that of a hand grenade, he said. The devices were discovered late Tuesday by environmental divers hired to check on algae growth in the harbor, officials said. “The question is … how did they get there? We have no idea,” he said, adding that officials think it’s unlikely the explosives are from the nearby Seal Beach Naval Weapons Station. Amormino said investigators believe the caps were placed in the water sometime in the past two days, based on the corrosion on the wires. The wires were colored bright orange and bright green, and would be visible from a distance to a diver in the area, he said. Several agencies were called to help remove the explosives, including bomb squads from the Orange County Sheriff’s Department and Los Angeles Police Department, the FBI, the Department of Justice and the Bureau of Alcohol, Tobacco and Firearms. The caps were placed in a reinforced box and will be taken to a remote location and detonated. Officials do not suspect terrorism, but an investigation is ongoing, Amormino said. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! SANTA ANA, Calif. – Divers worked Wednesday to recover at least eight wired blasting caps discovered in a Huntington Beach harbor. Authorities ordered a ban on cell phone use to prevent accidental detonation of the devices. The explosives were described as commercial-grade detonators used to trigger large explosions in mines or other sites and were considered highly unstable, Orange County Sheriff’s Department spokesman Jim Amormino said in a telephone interview. They are about the size of a cigarette and were spread over a 150-yard area beneath nine to 15 feet of water, he said. Each cap was attached to a 10-foot-long, brightly colored wire and the caps appeared to have been intentionally placed on the ocean floor within the last 36 hours, he said. “They are very unstable in salt water. They do pose a threat to the divers, any swimmers, any boaters in the area,” but not to nearby homes or large yachts, he said.