In Thailand, suspected Islamic separatists have killed three people and injured another three, including a teenage girl, in a string of shootings in the troubled south.Police said a former district head was gunned down in a drive-by attack as he was on his way to a local mosque in Narathiwat last evening. In a separate incident the same evening, two Muslim civilian defence volunteers were shot dead as they were on their way home in Yala.In another incident on the same night, a 40-year-old Buddhist man was fatally injured when suspected militants opened fire as he sat in front of his house in Pattani. A 14-year-old girl was among three people wounded in the Pattani attack. More than 4,300 people, both civilians and security personnel, have been killed in the Muslim-majority southern provinces since a separatist insurgency erupted more than six years ago.