A powerful explosion destroyed a 24-hour gym in Amsterdam Nieuw-West overnight, leaving seven people injured, two critically. Emergency services now believe there may be additional people trapped beneath the rubble, prompting a slow and careful demolition of the building using a crane. Initial searches involved drones and search dogs, but instability forced a more deliberate approach. Authorities have not yet determined the cause of the explosion, focusing currently on the ongoing rescue operation, which is expected to last for several hours. The gym owner claims footage suggests the blast originated from beneath the floor, near gas lines and electrical infrastructure. Investigations are ongoing, with police keeping all potential causes open while prioritizing the search for survivors.