|An injured Thai soldier after clashes with Cambodian troops|
"Heavy weapons including rockets, machine guns and mortars, artillery have also been used in the exchange fire," he added.
The fighting is taking place near the 11th century Hindu Preah Vihear temple, and the Cambodia government has said that the temple was damaged in the firefight.
Several villages in the Thai region of the border area were also damaged by artillery shells and several people have been injured. Many residents have evacuated Kantharalak.
Thai prime minister Abhisit Vejjajiva has rejected calls for intervention by other countries to help resolve the conflict. On Sunday, in his weekly television and radio broadcast, he said there was no need for other ASEAN member countries to step in. He said he was confident that the dispute could be resolved through bilateral negotiations, but insisted Thailand would not withdraw its troops, as demanded by Cambodia.
He added that the Thai government would seek the suspension of Preah Vihear temple's listing as an UNESCO World Heritage site.
More recently, tensions have risen over the arrest of seven Thai politicians and nationalist activists in Cambodian territory. Last week, Veera Somkwankid and Ratree Pipatanapaiboon were sentenced to eight and six years in jail respectively for espionage.