A bomb blast wounded six police and government officials in Thailand's rebellious south yesterday, police said. The 5-kg bomb hidden in a metal box exploded at an intersection in the southern province of Narathiwat where the six had stopped in their patrol car, a provincial police official said. "The bomb was detonated by mobile phone. Of the six, one was seriously injured," said the official, who declined to be named. Later, in the province of Yala, three suspected drug dealers were arrested and were suspected to be involved in violence in the south, according to Lt. Gen. Adul Saengsingkaew. Police also found 50 kg of marijuana, pistols, rifles and 30 kg urea fertiliser, which can be used in crude bombs, at their residence.