PHNOM PENH, Cambodia (CNN) -- Nearly 100 Thai soldiers crossed into Cambodian territory Wednesday near a disputed border temple that was the site of clashes last year, Cambodian officials said.
Cambodian troops guard the Preah Vihear temple late last year amid heightened tensions with Thailand.
The Thai army denied the claim.
Thai soldiers crossed into the area of the 11th century Preah Vihear temple about 1:40 p.m., said Phay Siphan, secretary of the Cambodian Council of Ministers.
The two sides did not fight and Cambodia has asked Thailand to pull back.
Thai Army Col. Sansern Kaewkumnerd said the troop movement was part of a normal rotation and that Thai soldiers had not gone anywhere they were not permitted to be.
For months last year, the two countries saber-rattled over the ancient temple. The nations differ on whether some territory around the temple forms part of Thailand or Cambodia.
Both countries posted troops in the area after the United Nations in July approved Cambodia's application to have the temple listed as a World Heritage Site -- a place the United Nations says has outstanding universal value.
The temple 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 (4.6 sq. km) area around it was never fully demarcated.
Thailand says the dispute arose from the fact that the Cambodian government used a map drawn during the French occupation of Cambodia -- a map that places the temple and surrounding area in Cambodian territory.
The United Nations' 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.
Last year's flare-up began July 15, 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 claimed Thailand sent troops to retrieve the trio and gradually built up their numbers. Thailand denied that, saying its troops are deployed in Thai territory.
-- CNN's Tim Schwarz in Phnom Penh, Cambodia, and Kocha Olarn in Bangkok, Thailand, contributed to this report.