On the afternoon of 28 March 2024, Rochester Police Department officers and FBI agents conducted a raid on an apartment building on the 200 block of Andrews Street in Rochester. The building was evacuated, and law enforcement discovered two IEDs in an apartment that was home to a 3D printing business. Police arrested a 24-year-old man who leased the unit. No further device details were released. The suspect was charged with criminal possession of a weapon in the 3rd degree.

n 27 March 2024, the Henderson Police Department and Fire Department received reports that a pyrotechnic functioned at a Church of Jesus Christ of Latter-day Saints meeting house in Henderson at the 800 block of Arrowhead Trail. The unidentified suspect entered the meeting house and threw a pyrotechnic on the floor where a youth activity was being held. Four people sustained minor injuries. The Metropolitan Police Department and the FBI are assisting in the ongoing investigation.

n 29 March 2024, detectives from St. Tammany Parish Sheriff’s Office (STPSO) Narcotics Division and Proactive Enforcement Unit discovered improvised incendiary devices (IIDs) and bomb-making materials (BMM) while searching a Mandeville residence on the 2500 block of Rue Weller. The STPSO Hazardous Device Unit was called to the scene to assist with handling the found materials, which included five complete IIDs, one nearly complete IID, and a large assortment of BMM used to construct IIDs. No details about the BMM were released.

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 22 March 2024, several armed suspects stormed Crocus City Hall, a large music venue in Moscow, and threw incendiary devices at concertgoers and opened fire, subsequently triggering a massive fire within the venue. At least 143 individuals were killed and over 80 were injured. The Islamic State Khorasan (ISIS K) claimed responsibility for the attack. Russian authorities have not confirmed the authenticity of this claim. The incident is the deadliest attack in Russia since the 2004 Beslan school siege. Four suspects were arrested for terrorism charges, and the investigation is ongoing.