Police would not rule out he was the same man who appeared in the Erawan CCTV footage and are investigating further.
The police chief asked the public to send tips to authorities if they see someone they suspect was the man seen wearing a yellow shirt and leaving a backpack at the Erawan blast site.
The Sathorn bombing took place at 1.20pm, but half the pier remained open with boat operations continuing as normal. Police closed Sathorn Road to traffic from the pier to the Saphan Taksin Skytrain station to investigate