Residents in Thailand's Ban Thanon Khot are accustomed to the rumbling of trains – rail is a key mode of transportation connecting the remote town with major cities. But on Wednesday, the mundane rhythm ended in tragedy. The noise was abnormally loud. A huge, crashing sound, said school volunteer Pitchaya Promenade. I saw a blue crane sliding. It seemed stuck for a moment, and suddenly it flipped over. The construction crane had collapsed onto a moving train, killing at least 32 people and injuring 66 others. Most were students and workers travelling for school and work. Thailand's Public Health Ministry confirmed that there are still three people missing from the accident. Rescuers were still pulling bodies out of the mangled train when the BBC arrived at the scene in the evening. Parts of it were completely crushed. If I had to describe the damage visually, it looked like a spoon scooping into a slice of cake, said Pitchaya, 32, who is trained in basic first aid and was able to attend to some of those wounded. There was an elderly woman hanging upside down [from a carriage]... Another woman, whose right arm appeared to be broken, was holding onto her. One of the train carriages had caught fire from the collision, complicating rescue efforts. Emergency responders employed cranes and hydraulic cutting tools to free passengers trapped in the wreckage. People were screaming 'Help! Help!' and smoke was starting to rise, said restaurant owner Penporn Pumjantuek, who works about 100m from the scene. Oil from the train was spilling everywhere. Thai Prime Minister Anutin Charnvirakul has called for an investigation, while the State Railway of Thailand is pursuing legal action against the firm responsible for the construction where the incident occurred.