On the evening of 14 March 2024, Parker Police Department (PPD) officers responded to a report of a stolen vehicle near a grocery store. The investigation led to an arrest and a report of a suspicious device near the same grocery store. The PPD called in the Douglas County Explosive Ordnance Disposal Unit for assistance. Bomb technicians examined the suspicious device, shown in an x-ray and picture as a tube wrapped in tape with internal fragmentation and possessing a green fuse, and confirmed that it was a viable IED. The device was removed from the scene and rendered safe.

On 11 March 2024, at approximately 0445 hours local time, unknown suspects from an “informal action group” ignited several improvised incendiary devices (IIDs) at four power lines in Vecqueville, Haute Marne. The IIDs short circuited three of the four targeted power lines, leaving a smell of gasoline. The group took responsibility for the attack, stating that their intention was to stop production at the geological disposal facility for radioactive waste. No further device details were provided. The investigation is ongoing.
 

On 17 March 2024, Bethany Police Department (BPD) officers and the Bethany Fire Department (BFD) responded to a home near Northwest 50th Street and North Rockwell Avenue for a report of a fire. The BFD extinguished the fire and reported that accelerants had been used, as well as identified bullet holes on the side of the house. Neighbors told responding officers that they had heard explosions and gunshots prior to the blaze.

On 14 March 2024, an FBI tactical team raided a home in Madisonville as part of an investigation into the purchase of materials that were suspected of being used to make explosive devices. The FBI was first alerted about a 66-year-old man making online suspicious purchases of explosive manuals and bomb making material (BMM), including explosive precursor chemicals (EPCs), in January 2024. The suspect did not have a license to deal in the materials and had been arrested previously for the manufacture of IEDs.

On 10 March 2024, at approximately 1100 hours local time, Riverside County Sheriff's Department (RCSD) deputies conducted a traffic stop of a suspect with several warrants out for his arrest near the intersection of Ramona Expressway and State Street in San Jacinto. Deputies found 5 lb of explosive material, 8 firearms, a suppressor, ammunition, and high-capacity magazines while searching the suspect's vehicle. RCSD deputies searched the suspect’s home at the 1400 block of Calle San Sebastian and discovered 20 lb of additional explosive material.