Rescue teams were digging through the rubble of a nightclub in the Azerbaijani capital early Sunday after an explosion tore through the building, killing at least one person and injuring dozens more, according to government officials. The explosion at the Location Club in Baku was believed to have been caused by a gas leak, but the investigation was ongoing, Interior Ministry spokesman Ehsan Zahidov told the Associated Press. The attorney general’s office reported one death and said 31 people suffered various injuries. They had been hospitalized, most of them with burns. Emergency services issued a statement that firefighters were called to the downtown club at 3am. and put out the fire before it could spread. A video posted to social media showed dozens of panicked people, some injured, outside the club, which appeared to have been badly damaged by the blast.