At least four people killed, one gone missing in firework factory explosion in Phichit province yesterday At least four people were reportedly killed and one has gone missing after a firework factory in Phichit province exploded yesterday, February 4th, in the evening. Sak Lek Police from the Phichit Province arrived at the scene in the Nong Ya Sai Subdistrict after being alerted of a large fire followed by an explosion, damaging six nearby houses and initially killing four locals