Srivara, in his capacity as head of the investigation into the spate of bomb and arson attacks in seven provinces on August 11-12, said he would submit the case file on the Phuket and Surat Thani bombings to prosecutors.
He said the overall case had progressed 70 per cent and he was not satisfied because investigator had been unable to identify the masterminds.
He said that as a result the motive behind the attacks – which killed four and injured more than 30 – was unclear.