According to NBC, a natural gas leak is the preliminary cause of the incident. The explosion triggered a massive fire within the facility.

Bristol Fire Chief Kevin Dippolito stated during a press conference that five people were initially feared missing, though "they may have left the scene with family members."

Police reported that 20 people were injured and transported to hospitals. The blast caused part of the first floor to collapse into the basement, forcing rescuers to evacuate residents through windows and elevator shafts, reported by report.az.