3 killed in explosion at Thai apartment building

BANGKOK — A blast blew out the side of a residential building in a Bangkok suburb Tuesday killing three people and injuring nine, emergency workers said, as police speculated the explosion could have been caused by a bomb.
Police had yet to establish the cause of the blast, which took place around 6 p.m., and there was no obvious reason that the 5-story apartment block in Nonthaburi province just north of the Thai capital might be a target.
TNN cable news channel reported that police explosives experts were speculating that the blast was caused by TNT or C4 explosive, perhaps used in a bomb as big as 50 kilograms (110 pounds).