The unprecedented August attack at a shrine in a bustling shopping district killed 20 people, mostly ethnic Chinese tourists, landing a fresh blow to the nation's image as a holiday paradise after last year's military coup and months of street protests which preceded it.
The reward from Panthongtae Shinawatra -- the first born son of populist leader Thaksin -- follows Thai police rewarding their own officers some USD 84,000 for arresting the bombing suspect two weeks after the blast.
Thailand's national police chief Jakthip Chaikinda confirmed the money had been received, telling reporters today that the sum was marked for police officers involved the investigation and those who provided tip-offs.
It was not immediately clear if any members of the public would receive a cut for tip-offs. The earlier reward from police was earmarked only for officers as officials at the time said they had not received any public tip-offs after their call for information.
They said the man -- named by police both as Bilal Mohammed and Adem Karadag -- had confessed to planting the bomb. The suspect's lawyer later confirmed his client had admitted doing so.
But mystery still shrouds the motive for the unclaimed attack.
On Sunday Jakthip said police had not ruled out any motive for the crime with warrants out for more than a dozen other suspects believed to be involved.
