PHNOM PENH , Cambodia -LRB- CNN -RRB- -- Cambodia has sent a letter to the United Nations Security Council to call attention to its continuing standoff with Thailand over an ancient border temple on disputed land . Cambodian soldiers stand guard near Preah Vihear temple , close to the Thai border . The country is not asking for U.N. intervention , said Information Minister Kheu Kanharith . Rather , the letter that Cambodia 's permanent mission in New York submitted to the chairmen of the Security Council and the General Assembly is meant to draw attention to a crisis that entered its sixth day Sunday . The two countries agreed to meet Monday to defuse tensions -- even as each side continued to amass more troops to the site of the Preah Vihear temple . Both Cambodia and Thailand lay claim to the 11th century temple , which sits atop a cliff on Cambodian soil but has its most accessible entrance on the Thai side . The International Court of Justice awarded the temple to Cambodia in 1962 . Thailand claims , however , that the 1.8 square mile -LRB- 4.6 sq. km -RRB- area around it was never fully demarcated . Thailand further says that the dispute arose from the fact that the Cambodian government used a map drawn during the French occupation of Cambodia that places both the temple and the surrounding area in that country 's territory . Earlier this month , the United Nations approved Cambodia 's application to have the temple listed as a World Heritage Site -- places the U.N. says have outstanding universal value . The decision re-ignited tensions , with some in Thailand fearing it will make it difficult for their country to lay claim to disputed land around the temple . Opposition parties in Thailand used the issue to attack the government , which initially backed the heritage listing . A Thai court overturned the pact , prompting the resignation of Thailand 's foreign minister , Noppadon Pattama . He had endorsed the application . Cambodia , meanwhile , is preparing for general elections on July 27 . And Prime Minister Hun Sen , who has been in power since the mid-1980s , has portrayed the U.N. recognition as a national triumph . The current flare-up began Tuesday , when Cambodian guards briefly detained three Thais who crossed into the area . Once they were let go , the three refused to leave the territory . Cambodia claims Thailand sent troops to retrieve the trio and gradually built up their numbers . Thailand denies the charge , saying its troops are deployed in Thai territory . Each side has asked its troops to withhold fire unless they are fired upon . So far , the only casualty has been a Thai soldier who was injured Tuesday by a landmine -- possibly left over from the time the Khmer Rouge occupied the area . The Khmer Rouge , a radical communist movement that ruled Cambodia from 1975 to 1979 , won power through a guerrilla war . It is remembered for the deaths of as many as 1.5 million Cambodians . -- Journalist Soeum Yin contributed to this report