A bomb blast hit the residence of Supreme Administrative Court president Akrathorn Chularat in Chatuchak district early Tuesday morning.
Akrathorn was not in his residence in Soi Lardprao 25, Phaholyothin Road, as he was on an overseas trip.
Police were alerted to the bomb blast at about 1am.
Witnesses said they heard the sound of motorcycles in front of the house shortly before the bomb exploded.
Police found a 10-centimetre deep pit about four meters wide on the grounds within the compound.
Police did not find any shrapnel nor remnants of firecrackers on the scene. They suspect the attack may be intended to cause panic and not to harm anybody.