Lt Col Anukul Nookaid of Kathu Police was alerted of an incident at 4:30am where it was reported that three youths had had attacked four tourists on Patong Beach close to Graceland Hotel.
The victims, were named as Daniel James Wade, 20, and Ms Natasha Gibson, 21, from Australia and Anton Lukin, 30, and Ms Aleksandra Obodova, 22, from Russia.
Mr Lukin suffered an injury to his hand and was admitted to Patong Hospital, Ms Obodova suffered injuries to her left hand, right knee and abdomen and was admitted to Vachira Hospital. Both are recovering well from their injuries police have been told.
According to the police statement, the four were playing in the water when three teenagers arrived at the beach. Mr Lukin and Ms Obodova came to shore and were threatened by the youths with a knife.
The two sustained injuries whilst trying to grab the knife from the attackers.
Mr Wade and Ms Gibson tried to assist the two Russians and sustained minor injuries.
The three youths then sped away on a motorbike towards Loma Park.
Lt Col Anukul said, “We are currently checking CCTV footage from the area to assist us in finding the suspects.”