An explosive device detonated in a Monaco residential building shortly before 9 p.m. local time, injuring three people including Ukrainian oligarch Vadym Yermolaiev, a woman in her 50s or 60s, and a 13-year-old boy. The device was concealed in a backpack and contained anti-personnel materials such as bolts. Monaco authorities described the incident as a deliberate criminal act while police in Monaco and France search for a suspect.