Cambodian Prime Minister Hun Sen and his Thai counterpart Yingluck Shinawatra talked on border matters on the sidelines of the 22nd ASEAN Summit in Brunei, a Cambodian senior official said Thursday.

"The two prime ministers had a short meeting during a coffee break at the 22nd ASEAN Summit," Kao Kim Hourn, secretary of state at the Ministry of Foreign Affairs, told reporters at Phnom Penh International Airport upon Hun Sen's return from Brunei.

"They agreed to encourage both sides' peoples along the borders to continue maintaining good relations and promoting trade and investment," he said. "They also pledged to avoid armed clashes."

The two neighbors have had sporadic border conflicts over territorial dispute near Cambodia's Preah Vihear Temple since the UNESCO listed the temple as a World Heritage Site on July 7, 2008, but Thailand claims the ownership of 4.6 square km of scrub next to the temple.

Deadly clashes between the two sides' troops happened in February and April 2011 during the rule of former Thai Prime Minister Abhisit Vejjajiva.

Military tensions have eased since August 2011 when ex-Thai Prime Minister Thaksin Shinawatra's Pheu Thai Party won a general election and led the current government.

Last week, the two countries delivered their oral statements on the dispute to the International Court of Justice in the Netherlands, and the court is expected to issue a decision on who owns the disputed land around the Preah Vihear Temple later this year.