Six people were killed and 20 were injured, including two Americans, in an explosion at a Playa del Carmen resort on Sunday, reported CNN.
There were no gas lines located in the area of the explosion and investigators think that it could have been from a mix of gases from a nearby swamp and from sewage, said Quintana Roo state Attorney General Francisco Alor, reported the Associated Press.
"I looked and you could see that the roof (of the restaurant) had collapsed. There was a large crater in the area, debris," James Gaade, a resident of St. Catharines, Ontario, said. He was walking on a nearby beach when he heard the explosion and saw smoke. He guessed that over half of the guests at the hotel were Canadian, said the Associated Press.