Meanwhile, the reward for the bombing suspect went up to 10 million baht (USD 335,000) with former Thai prime minister Thaksin Shinawatra’s son today offering 7 million baht for the arrest of those behind the blast in the temple, in addition to the 3 million baht already offered by authorities.It is still not clear what motivated the attack as there has been no claim of responsibility with suggestions of domestic political turmoil to Muslim insurgents in the south, but officials say it is unlikely that an international terror group is involved.