The day was dominated by a massive explosion at a fitness studio under a flat in Amsterdam-Osdorp, which injured at least seven and led to the evacuation of 400 residents. The story broke late on June 11 and escalated through the morning, with search operations using drones and sniffer dogs amid fears of further victims. By afternoon, arrests were made and a plofkraak explosives ring involving teenagers was uncovered. The search ended in the evening with no additional victims found.
SpaceX's record IPO also drew attention, making Elon Musk the first trillionaire. The EU migration pact took effect but was marred by a data system glitch. A fatal school trip accident in Zeeland continued to reverberate, and a potential Iran-US peace deal emerged late in the day.