On 17 January 2024, New York City Police Department officers found 8 IEDs, 6 ghost guns, 600 rounds of ammunition, pyrotechnics, bomb-making instructions, and 3D printers while searching an apartment in Queens. One device was described as a “partially constructed IED rigged with a tripwire,” and a photo released of four IEDs depicts them as soda can-size cylindrical devices covered in tape with green fuses. Two brothers were taken into custody on 29 January and indicted on 130 counts of criminal possession of a weapon and related charges.

On 25 January 2024, at approximately 0840 hours local time, Florida Highway Patrol responded to the shoulder of the Interstate 75 exit ramp leading to State Road 52 in Pasco County for a report of a suspected explosive device that had been discovered by contractors with the Florida Department of Transportation. Tampa Police Department and state bomb technicians were contacted and arrived at the scene to examine the device. The device was removed for further testing. No further device details were released. An investigation is ongoing.
 

On 26 January 2024, San Diego Police Department (SDPD) officers responded to Rancho Bernardo High School in San Diego after a juvenile threatened to conduct a shooting at the school. The juvenile was taken into custody, and no explosives were found at the school. On 30 January, SDPD officers responded to the juvenile’s Poway home with a gun violence restraining order and a search warrant and found explosive devices, several unregistered guns, and supplies to make ghost guns.

Over the weekend of 13 January 2024, Mexican military personnel and police officers discovered a workshop in La Huacana, Michoacán, where they seized 117 explosive devices in various stages of construction including improvised grenades and Molotov cocktails. Along with the explosive devices, bomb making material (BMM) was found including more than 100 kilograms of explosives, explosive charges, fragmentation, bottles for making Molotov cocktails, materials used to make improvised mortar shells, 11 liters [~0.26 gallon] of muriatic acid, and aluminum foil, among other items.

On 5 January 2024, Zagreb Police Department officers discovered four hand grenades, 200 g of TNT, a blasting cap, two automatic weapons, and hundreds of pieces of ammunition while searching a Dubrava residence. The search followed a 4 January incident in which officers responded to the residence for reports of domestic violence and confiscated an air rifle from the occupant. The 65-year-old male resident was charged with illicit possession, manufacture, and acquisition of weapons and explosive substances.