Two home-made time bombs set to explode at 9 am were found outside the Criminal Court Monday morning.
Security officials of the court found one of the bombs at a bus stop in front of the Office of Public Prosecutors Region 1 and the other outside the wall in front of the court.
Traffic on the Ratchadapisek Road was closed when explosive ordnance disposal officers defused the bombs.
Police Spokesman Pol Maj Gen Anucha Ramayanon said the explosives weighing about 15 kilogrammes were found in each fire extinguisher tank that was used to make the bombs.
Anucha said the bomb could have cause damage in 20 to 40 metres radius.