Bangkok , Thailand ( CNN ) -- At least three Thai soldiers were killed Friday in a new round of clashes with Cambodian troops in a disputed border region , a military official said . Thirteen other Thai troops were injured , Lt. Col. Siriya Khuangsirikul said . The fighting broke out near two temples in the Phanom Dong Rak of southeastern Thailand 's Surin province , Thai army spokesman Col. Sunsern Kaewkumnerd said . A Cambodian foreign ministry spokesman could not immediately be reached for comment . Authorities evacuated between 7,000 and 10,000 residents to temporary shelters as clashes erupted , Ong-art Klarmpaibul of the Thai prime minister 's office said in an interview with the Thai Public Broadcasting System . Sunsern said the cause of Friday 's clashes `` is not yet known . '' At least 10 people were killed when renewed fighting flared up in another disputed border area between the two nations in February , prompting the U.N. Security Council to issue a statement calling on both sides to implement a permanent cease-fire and `` resolve the situation peacefully and through effective dialogue . '' Those clashes , which lasted four days , stemmed from a longstanding conflict related to the 11th-century Preah Vihear temple . Both Cambodia and Thailand lay claim to the temple , which sits atop a cliff on Cambodian soil but has its most accessible entrance on the Thai side . At the time , each nation accused the other of firing first , according to a statement from the Association of Southeast Asian Nations . Conflict over the site has taken place periodically for years . In 1962 , the International Court of Justice in The Hague , Netherlands , ruled that the site was in Cambodia , adding that the structure was `` an outstanding masterpiece of Khmer architecture . '' But Thailand says the 1.8-square-mile ( 4.7-square-kilometer ) area around Preah Vihear was never fully demarcated , and blames a map drawn at the beginning of the 20th-century during the French occupation of Cambodia . CNN 's Kocha Olarn contributed to this report .
NEW : Authorities evacuate at least 7,000 people as clashes erupt . Two Thai troops are injured and two are killed , the military says . A Thai military spokesman says the cause of the fighting is unknown . The fighting began more than two weeks after clashes in another disputed border area .