KUALA LUMPUR/BANGKOK - Thailand and Cambodia have agreed to the deployment of an ASEAN observer team as efforts to de-escalate their conflict continue, Malaysian Prime Minister Anwar Ibrahim said on Wednesday.

Malaysia's engagement would continue across multiple channels, including communications between leaders, foreign ministers and the respective chiefs of armed forces, and a meeting between ASEAN foreign ministers scheduled for Dec. 22 in Kuala Lumpur, Anwar said, according to a Bernama report.

He said that Thailand and Cambodia have agreed to attend the meeting on Dec 22, a Malaysia- and ASEAN-initiated effort aimed at easing tensions and preventing further escalation along the Thailand-Cambodia border.

"We are appealing to them to immediately stop these frontline offensives and, if possible, immediate ceasefire," he said.

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The latest round of Thailand-Cambodia conflict has left at least 19 Thai soldiers and 19 Thai civilians dead, with over 270,000 people displaced, Thailand's defense ministry announced on Wednesday.

The ministry's spokesperson Surasant Kongsiri said that from Tuesday night to early Wednesday morning, Cambodia continued to use heavy weapons to launch attacks against Thailand in border areas, and Thailand had to fight back.

The Thai military announced on Tuesday that the curfew imposed in certain areas would be lifted with immediate effect.