Thailand and Cambodia are set to hold rare high-level talks on the sidelines of the Association of Southeast Asian Nations summit in the Philippines, as a fragile ceasefire continues to hold following deadly border clashes last year.

Cambodia has expressed deep regret over the possibility that Thailand may unilaterally withdraw from a maritime memorandum of understanding (MoU), according to a statement from Cambodia’s Ministry of Foreign Affairs and International Cooperation released on Saturday.

China’s Foreign Minister Wang Yi has expressed hope for improved relations between Thailand and Cambodia following recent border tensions, according to the Thai government.

Thailand accused Cambodia on Tuesday of violating a 10-day-old truce after cross-border mortar fire reportedly wounded a Thai soldier.

A renewed ceasefire between Thailand and Cambodia over border clashes has passed the 72-hour mark, the initial target for stabilizing the conflict, but no updates have been provided on the planned release of 18 Cambodian soldiers detained since July.

Thailand’s army on Monday accused Cambodia of violating a recently signed ceasefire agreement by flying more than 250 drones into Thai territory, following weeks of deadly border clashes between the two neighbors.

The foreign ministers of China, Cambodia, and Thailand reached a three-point consensus during a trilateral meeting held Monday in Yuxi City, southwest China’s Yunnan Province.

Thailand and Cambodia announced that they have signed a ceasefire agreement aimed at ending weeks of intense fighting along their shared border.