Fresh surveillance footage has emerged that could help identify those responsible for the Bangkok bomb that killed 20 people, Thai authorities have said.
Video obtained by Thai media shows a man in a blue shirt placing a bag on a riverside path, then kicking it into the water on Monday night shortly after the explosion several miles away at the Erawan shrine.
About 18 hours later, at 1pm on Tuesday (0700 BST), an explosion took place at the same spot on the river near a busy pier but caused no casualties.
Police spokesman Prawuth Thavornsiri said police were seeking the man for questioning, though it was unclear whether he was connected with either explosion. “The thing he kicked in the water might just be garbage, we don’t know yet,” he said.
Authorities have not, however, ruled out a link between the two explosions. A government spokesman said 56 people were still in hospital on Saturday, many with horrific injuries caused by the explosion at the shrine.
The police investigation has largely been driven by video footage, but much has been too blurry to identify its subjects.
The one suspect for whom an arrest warrant has been issued was seen leaving a backpack at the spot where the bomb went off at the shrine minutes after he departed.
Police have released a sketch of the suspect, depicting him with glasses and bushy, black hair, and offered a reward that was raised to 3m baht (£54,000) on Friday.
The total reward money on offer from both police and private citizens now stands at more than £200,000.
After initially being criticised for sending out confusing messages, authorities have appeared more guarded in their statements.
Military spokesman Colonel Winthai Suvaree said on Friday that police were making much progress, but he could not reveal any details. On Saturday, he said information would be made public once it was no longer needed to be kept secret as part of the investigation.
