The statement by the Thai government that they believe there are no links between Monday night's bomb attack and international terrorism is an important development in a hitherto muddled investigation.
Col Winthai Suvaree, an official spokesman for the ruling military junta, said Thai security agencies had been co-operating with the agencies of allied countries, and from those consultations had come to the preliminary conclusion that the bombing was unlikely to be linked to international terrorism.
He also stated that Chinese tourists, who make up a high proportion of foreigners visiting the shrine, were not the target, which appears to rule out any connection with Uighur militants. Thailand controversially deported a large group of Uighur asylum-seekers to China last month.
The Thais may have asked for information from China, and agencies in neighbouring south-east Asian countries, as well from the United States, which is a treaty ally.
Thailand and the United States have a long history of intelligence collaboration, and strong collaborations between their police forces. Relations have been strained following last year's military coup, and the only official US statement so far has been that they have not been asked for assistance by Thailand.
But it is very likely the Thais will have asked for information from US intelligence agencies about well-known international groups like al-Qaeda and Islamic State.