The move follows a Thai government decision last month to unilaterally terminate a 2001 agreement with Cambodia that provided a framework for negotiations over the disputed area in the Gulf of Thailand where the two countries' maritime claims overlap.

Cambodia initiated a UN-backed dispute resolution process on Tuesday with neighbour Thailand over overlapping maritime claims in the Gulf of Thailand.

PHNOM PENH, June 2 — Cambodia initiated a UN-backed dispute resolution process today with neighbour Thailand over overlapping maritime claims in the Gulf of Thailand where...