Cambodia has called for an "immediate" ceasefire with Thailand, after two days of cross-border fighting between the two South East Asian neighbours.

Cambodia's ambassador to the UN, Chhea Keo, said his country asked for a truce "unconditionally", adding that Phnom Penh also wanted a "peaceful solution of the dispute".

Thailand has not publicly commented on the ceasefire proposal. It earlier declared martial law in eight districts bordering Cambodia.

At least 16 people have been killed and tens of thousands displaced in both countries, who accuse each other of firing the first shots on Thursday.

Thailand's acting Prime Minister Phumtham Wechayachai on Friday warned that the clashes could "move towards war".