The ceasefire reached in Malaysia was supposed to take effect at midnight on Monday, but it was quickly tested as Thailand and Cambodia continued to accuse each other of violating the truce agreements.

PUTRAJAYA, Malaysia (AP) — Thailand and Cambodia agreed Monday to an unconditional ceasefire during a meeting in Malaysia, in a significant breakthrough to resolve five days of deadly border clashes that have killed dozens and displaced tens of thousands.

A ceasefire between Cambodia and Thailand appears to be holding, hours after it came into effect at midnight local time (1 p.m. ET Monday), following days of clashes across the two countries’ disputed border.