Three Russian tourists were rescued and one went missing after being swept into the sea by strong waves at the famous Cape Promthep in Phuket on Friday.
The four men had walked along a prohibited zone at the cape in tambon Rawai on Friday morning when the incident occurred, police said.
One of the four tourists went missing. A search operation was immediately launched for the missing man.
One of the rescued tourists sustained minor injuries and was sent to hospital.
According to the local mayor, a rescue centre was alerted of the incident at around 9.30am, and officials boarded jet skis and boats to help.
The search continues for the missing tourist.