National police chief Pol General Chakthip Chaijinda flew to the southern province of Yala on Friday to join the interrogation of suspects in custody over the torching of a Betong-Bangkok bus on December 17 in Yala's Bannang Sata district.
Chakthip also urged officers to beef up security in the deep South.
Chakthip, along with his assistant Pol Lt-General Chaiwat Ketwarachai, went to the Police Operations Centre in Muang Yala to follow up on progress in three cases – the bus torching, a roadside bomb wounding 10 paramilitary rangers in Pattani's Nong Chik district on the morning of January 10 and the murder of three family members at their home on the night of January 10 in Pattani’s Thung Yang Daeng district.
After hearing reports, Chakthip said the three cases had much progressed.
Chakthip also joined for 30 minutes the ongoing interrogation of the two unnamed suspects who had made confessions in the bus burning case.
He later told reporters that the suspects gave useful information to the investigation, of which his deputy Pol General Srivara Ransibrahmanakul would be in charge. He said some 7-8 others who were apprehended during a search of 26 locations earlier this month also gave useful information.