Women wailed uncontrollably, men knelt sobbing and others just stared in disbelief outside a coal mine in western Turkey as rescue workers removed a steady stream of bodies Wednesday from an underground explosion and fire that killed at least 238 workers. The fate of an estimated 120 miners remained unclear in one of Turkey's worst mining disasters. According to AP, Turkish Prime Minister Recep Tayyip Erdogan postponed a foreign trip and visited the mine in Soma, about 250 kilometers (155 miles) south of Istanbul. The deaths were caused by carbon monoxide poisoning, officials said. Erdogan said the tragedy would be investigated to its "smallest detail" and "no negligence will be ignored." He discussed rescue operations with authorities, walked near the entrance of the mine and also comforted two crying women. Earlier, Erdogan declared three days of national mourning, ordering flags to be lowered to half-staff. Energy Minister Taner Yildiz said 787 people were inside the coal mine in Soma at the time of Tuesday's explosion and 363 of them had been rescued. Scores were injured, Yildiz told reporters in Soma, where he was overseeing operations by more than 400 rescuers.