On 13 March 2024, at least 300 colleges and universities were targeted by bomb threat emails, including Mississippi Valley State University, Valley City State University, Upper Iowa University, Truett McConnell University, Clemson, SUNY New Paltz, Rochester Institute of Technology, and Asbury University. No hazardous material has been found. A similar bomb threat campaign took place in February 2023, when Historically Black Colleges and Universities (HBCUs) were targeted. The investigation is ongoing.
 

On 28 February 2024, an unknown suspect threw an object at the feet of a child near a shopping mall in Basel, Basel-Stadt. The child took the object to a daycare to show friends, where it functioned in the child’s hand, injuring the child and seven others. The explosive device was originally believed to be a pyrotechnic device, but a father of one child later described the explosive as a “homemade bomb” with shrapnel. No further device details were provided. Authorities believe the suspect is between the ages of 20 and 22, per witness statements. The investigation is ongoing.
 

On 4 March 2024, local police officers and several fire departments responded to a hospital in Aachen after a 65-year-old female suspect barricaded herself inside a room and functioned unspecified pyrotechnics. The suspect was eventually arrested, and no further information has been released. 
 

Source stories here and here.
 

On 3 March 2024, at approximately 1730 hours local time, Hopkinton Police Department (HPD) received numerous reports of multiple explosions prompting officers to respond to a residence on Clarks Falls Road. At the scene, a 20-year-old male suspect was identified by police as having allegedly functioned binary explosives in an illegal manner. No additional device details have been released. Bomb technicians from the Rhode Island State Bomb Squad and personnel from both the Rhode Island State Fire Marshal’s Office and the Ashaway Fire Department were called in for assistance.