BANGKOK — Thai and Cambodian military officers say the border between their two countries is calm after four days of clashes that have killed at least 12 soldiers.

Thai army spokesman Col. Sansern Kaewkamnerd said Tuesday that the latest flare-up Monday night lasted around three hours.

Cambodian Defense Ministry spokesman Lt. Gen. Chhum Socheat confirmed that account. But he says the situation is tense and troops are on high alert.

The fighting is centered around two crumbling stone temples from the Khmer Empire and is rooted in a long-running dispute over where the border should be drawn. The conflict has fueled deep nationalistic fervor in both countries for decades.