Gas explosion, fire injure 4 in Dutch city of Utrecht
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A new report from the NTSB says that PG&E detected natural gas at the Hayward explosion site after crews supposedly capped the leak. Here are what other details it revealed about the hours leading up to the explosion that sent three people to the hospital.
Video. A large blast in Utrecht caused several buildings to collapse, injuring at least four people. Emergency services are still searching for potential victims.