An arrest warrant has been issued for a foreigner believed responsible for Monday's fatal bombing at a Bangkok shrine, as Thailand's ruling junta said the attack was unlikely to be "international terrorism."
Thailand's police chief said on Thursday that at least 10 people were suspected of involvement in the bombing at the Erawan shrine that killed 20 people, more than half of them foreign tourists.
"It is a big network. There was preparation using many people," police chief Somyot Poompanmuang told reporters.
"This includes those who looked out on the streets, prepared the bomb and those at the site and ... those who knew the escape route," he said.
"There must have been at least 10 people involved."
On Wednesday police released a sketch of the subject of the warrant - a man spotted on closed-circuit television footage examined after the blast.
Police said on Wednesday that man wasn't likely to be Thai based on the sketch done from the video surveillance images, but added that he may have been wearing a disguise to conceal his identity, the Bangkok Post reported.
The security video footage shows a man wearing a yellow t-shirt and baggy shorts leaving a black backpack at the shrine 15 minutes before the explosion on Monday. Two other men standing nearby have also been identified as suspects.
Assistant national police chief Prawut Thavornsiri told reporters on Wednesday that he hoped the suspect was still in the country and offered a $28,000 reward for information leading to his arrest.
On Thursday,the ruling military junta said the attack was not specifically aimed at Chinese tourists, although Chinese were the largest group among the foreigners killed in the blast.
"Security agencies have cooperated with agencies from allied countries and have come to the preliminary conclusion that the incident is unlikely to be linked to international terrorism," said Colonel Winthai Suvaree, a spokesman for the junta, known as the National Council for Peace and Order.
Speculation has been mounting as to the possible motive behind the deadly blast.