PUTRAJAYA, Malaysia — Thailand and Cambodia have agreed to an “immediate and unconditional” ceasefire in a significant breakthrough to resolve deadly border clashes that entered a fifth day, Malaysian Prime Minister Anwar Ibrahim said Monday.

The UN Security Council held an emergency closed-door meeting Friday in New York. Malaysia, which chairs the 10-nation regional bloc that includes both countries, called for an end to the hostilities and offered to mediate.

SURIN, Thailand (AP) — Thailand and Cambodia traded accusations Saturday of fresh attacks as deadly border clashes entered a third day, leaving at least 33 people dead and more than 168,000 displaced, as international pressure mounted on both sides to reach a ceasefire.

Thailand and Cambodia exchanged heavy artillery fire for a second day on Friday as fighting intensified and spread, while Cambodia's leader said Thailand had agreed to a Malaysian ceasefire proposal but then backed down.