Thailand and Cambodia have agreed to an "immediate and unconditional ceasefire" after five days of fighting at their border killed at least 33 people and displaced tens of thousands.

"There are reports of casualties and the Thai government is ordering the evacuation of certain areas," the U.S. State Department said in an alert.

Clashes between Thai and Cambodian troops at their disputed border have killed at least 12 people, Thai authorities say. The fighting marks an escalation of a dispute between the two South East Asian neighbours that dates back more than a century.

Thai and Cambodian soldiers have fired at each other in a contested border area after the nations downgraded their diplomatic relations in a rapidly escalating dispute.

With a ceasefire now in place, Thailand and Cambodia are pivoting toward sustained diplomatic engagement through a three-tier bilateral framework, as both nations commit to resolving their border disp

Malaysian Prime Minister Anwar Ibrahim said that it would come into effect at midnight local time, 1.pm Easter Time Monday July 28.

A ceasefire between Thailand and Cambodia appeared to hold Tuesday as tensions lingered despite a truce agreement to end deadly border clashes following economic pressure from the U.S. The ceasefire that was reached in Malaysia was supposed to take effect at midnight,