"Incident at arms manufacturing plant kills two in Bulgaria's Kazanlak", 25 April 2016

Incident at the Arsenal arms manufacturing plant in the Bulgarian town of Kazanlak claimed the lives of two workers...The incident occurred when a spark came out during repair works in one of the buildings on the territory of the plant. The initial information was that an explosion followed by a fire had occurred at the plant. However the executive director of the company noted that the incident was due to ignition rather than explosion.