A suicide bomber detonated an explosives-laden vehicle near a railway track as a passenger train passed through the southwestern Pakistani city of Quetta, killing at least 23 people and wounding over 70 others, officials said. The force of the explosion caused two of the train cars to overturn and catch fire, sending thick black smoke into the air, according to footage shared online Sunday. The attack happened in an area where security forces are usually stationed, badly damaging several nearby buildings and smashing vehicles parked along the road. Doctors at local hospitals said they had received the wounded, with 20 in critical condition.