(Repeats to additional subscribers) BANGKOK, May 9 (Reuters) - A roadside bomb killed seven soldiers in a pick-up truck in Muslim-majority southern Thailand on Wednesday, one of the deadliest attacks in three years of separatist unrest, army and police officers said. The bomb, which exploded in Narathiwat -- one of the three southernmost provinces where more than 2,100 people have been killed -- demolished the vehicle, army spokesman Colonel Acra Tiproch told Reuters, citing an initial field report.
