At least six people were injured when a bomb exploded and hit two passenger buses in Isulan, Sultan Kudarat, late Saturday afternoon, police and military officials said.

Senior Supt. Rolen Balquin, Sultan Kudarat Provincial Police director, said the explosion occurred at the “roundball,” or rotunda, in Brgy. Kalawag 2, around 5:45 p.m.

The explosion hit a Husky bus (UWI-541) driven by Nelson Pallado and a Yellow Bus Line unit (MVV-325) driven by Robinson Salatutan, Balquin said in a text message.

The blast injured Salatutan and his 23-year-old conductor Emil Sangki, as well as passengers Hilmor Hapinat, 36; Jonathan Delfin, 23; Kevin Dolfo, 19; and Rachel Catequista, 27, Col. Prudencio Asto, spokesman of the Army’s 6th Infantry Division, said in a separate message.

Initial investigation by the Army’s Explosives and Ordnance Disposal team indicated that the blast was caused by an improvised explosive device made of ammonium nitrate, fuel, and oil, and had nails for shrapnel, Asto said.

Flames engulfed the Husky bus, which was traveling from Cotabato City to Tacurong City, and had to be put out by firefighters, Balquin said. (John Roson)

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