The police investigation into an incident in which a truck fell into a hole on a Bangkok road last week found nothing to indicate that bribery of police was involved, an informed source has said.

The ten-wheel truck, which was found to be loaded beyond the legal weight limit, had a sticker with the letter “B” on the windshield.

It was widely claimed that the sticker was an indicator that a bribe had already been paid, so that the truck could operate in the capital beyond permitted hours and overloaded.

Pol Gen Torsak Sukvimol, the national police chief, assigned the police inspector general to launch an investigation into the claim of bribery, vowing to take legal and disciplinary actions against any police officers who are found to be involved in taking bribes.