Cambodia is seeking to "internationalise the issue to serve its own political objectives", Thailand’s ambassador to the United Nations Cherdchai Chaivaivid told a closed-door UN Security Council meeting.

A long-standing border dispute between Thailand and Cambodia escalated on Thursday, following years of tensions over contested territory.

Thai and Cambodian soldiers have clashed along the two countries' border in a major escalation of a festering dispute over territory that killed least 14 people, mostly civilians.