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On 8 July 2024, at approximately 2045 hours local time, an unidentified suspect driving a car by a home on Shea Boulevard and 104th Street in Scottsdale threw a pyrotechnic device, which functioned moments later. No injuries or damages were reported. Scottsdale Police are investigating the incident. No further device details were provided.
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On 2 June 2024, at approximately 1045 hours local time, San Mateo Police Department officers responded to a home on the 300 block of North Grant Street after receiving reports of a disturbance involving a couple sitting in a vehicle near the home. Officers searched the vehicle and discovered pyrotechnics and marijuana. A subsequent search of the home found 140 lbs. of pyrotechnics, 9 lbs. of marijuana, methamphetamine and an unregistered pistol with a silencer and ammunition.
On 1 June 2024, at approximately 0500 hours local time, an unidentified suspect at the University of California at Berkeley (UC) emplaced an improvised incendiary device (IID) underneath the back wheel of a police car, between the tire and fuel tank, and functioned it. UC Police responded and are leading the ongoing investigation. An anonymous online source took credit for the attack, claiming it was retaliation for the university’s response to the Israel-Hamas war. No further device-related details were provided.
On 29 May 2024, at approximately 1900 hours local time, Los Angeles Police Department (LAPD) officers executing a search warrant discovered 2,000 lb of pyrotechnics while searching the garage of a home in the 1600 block of West 146th Street. LAPD Bomb Squad technicians responded to assist and removed the pyrotechnics. No injuries were reported.
On 30 April 2024, at approximately 2245 hours local time, counterprotestors threw pyrotechnics at a protest encampment on UCLA’s campus in Los Angeles. The counterprotestors also used pepper spray or bear spray. Clashes between protestors and counterprotestors continued throughout the night, with the number of individuals injured unknown. UCLA Campus Police and medical personnel responded to the scene. No further information was released.
On 25 April 2024, Kings County Sheriff’s Office (KCSO) deputies arrested a 25-year-old Lemoore man in connection with a shooting on 19 April. KCSO deputies searched the suspect’s home and discovered explosive precursor chemicals (EPCs), completed homemade explosive material (HME), IEDs, and pyrotechnics. Kings County Fire Department and California Fire Marshal’s Office personnel were called in for assistance. Police believe the suspect had been removing explosive material from illegally acquired commercial manufactured pyrotechnics to construct IEDs and aerial pyrotechnics.
On 3 April 2024, at approximately 1137 hours local time, the Petaluma Police Department (PPD) began receiving reports of an explosion at Kenilworth Junior High School in Petaluma. PPD officers and firefighters were dispatched to the scene and the school was evacuated. With assistance from a PPD bomb-sniffing dog, police determined that a pyrotechnic device, described as a commercial “quarter-stick” style pyrotechnic, had been functioned inside a boys’ bathroom. No injuries were reported. PPD officers identified two juvenile male students as the alleged perpetrators.
On 30 March 2024, at approximately 0046 hours local time, San Diego Police Department (SDPD) officers responded to an alarm at Torrey Pines Elementary School in La Jolla, where they heard and then saw three juveniles fleeing from the school’s gymnasium. SDPD officers located the three suspects and detained them. Law enforcement searched the school grounds and discovered bomb-making material (BMM) that could be used to make nine improvised incendiary devices (IIDs), described as Molotov cocktails, and three of the nine IIDs were full of gasoline.
On 28 February 2024, Stanislaus County Sheriff's Office deputies arrested four suspects after discovering bomb-making material (BMM), 50 firearms, ammunition, gun silencers, and drugs while searching two locations in Stockton and Turlock related to a motorcycle gang. The raids were part of a months-long investigation of multiple gangs and were led by the Stanislaus Special Investigations Unit.
On 21 February 2024, Folsom Police Department officers discovered explosive materials, drugs, drug paraphernalia, firearms, and cash while searching a residence on the 9100 block of Golden Gate Avenue in Orangevale. The Sacramento County Sheriff’s Office Explosive Ordnance Disposal team was called to the site and removed all explosives from the residence. No additional details about the explosive material were released. A 53-year-old man was arrested and charged with unlawful creation, transportation, and possession of an explosive, among other felony charges.