Local police suspected insurgents were responsible for the bombings, but they are still looking into whether the incidents were related to Friday’s series of bomb attacks in Bangkok.

The suspects burned several tyres and laid nail stakes on roads leading to the scene of the explosion, to prevent pursuit by security officials.

Two of the ATMs were located in Khoke Pho district and one in Sai Buri district. Police said the bombs were triggered by time-delay detonators.