Palestinian authorities said a grave site discovered at the Nasser hospital, the main medical facility in central Gaza, contained nearly 400 bodies
Kamarudeng Saho, the third suspect, was apprehended in Sungai Kolok district of Thailand's Narathiwat province on Tuesday, the Bangkok Post reported.
He was taken to Bangkok and detained at the 11th Army Circle headquarters on Wednesday, Xinhua news agency reported.
Investigators found that the man had contacted Wanna Suansan, one of eight wanted suspects in the Erawan Shrine bombing that also injured more than 120, police spokesman Prawut Thawornsiri was quoted as saying.