Pol Lt Col Benjapol Rodsawat, deputy commander of Sa Kaew Immigration Office, said about 100,000 bottles of drinking water were passing through the checkpoint each day.

Benjapol said immigration officers checked the documents of Cambodian vendors after they were seen transporting the water in cars and on pulling carts.

The vendors provided proof that they had bought the water from the Rong Klua market and no illegal items were found hidden among the cargo.

Benjapol said he had talked to the Cambodian vendors and found that there is not enough drinking water on the other side of the border, so they came to buy the drinking water at increased prices.