Both the dead suspects are from Porathivu in Batticaloa, the sources said. Their identities were established from the documents which were in their possession.
Police further believe that the blast was caused prematurely.
Officials from the Government Analysts Department were expected to arrive in Kandy today to assist in the investigations. Police believe that the suspects who had boarded the ill-fated bus which was bound for Polonnaruwa, may have been targetting a utility such as an oil depot, when the bomb exploded prematurely. Senior police sources further said that three persons injured in the blast are believed to be accomplices of the main suspects now dead. Police further said that the suspects had been staying in an estate in Gampola. They have also been able to trace the battery which had been used to trigger off the premature explosion.