Both sides accuse the other of sparking the latest violence.
Thailand says one of its soldiers was killed Monday after Cambodian troops opened fire. It says the airstrikes were launched in response.
Officials from both sides say tens of thousands of people have fled the border area.
Thai Prime Minister Anutin Charnvirakul said his government “will do the utmost to protect the country’s sovereignty and territorial integrity.”
Cambodia denies triggering the fresh violence. The information minister said the Thai attacks killed four civilians. Cambodia called them a “grave violation” of the peace pact signed in October.
That deal followed deadly clashes along the border in July. The Thai government said it was suspending the peace agreement last month, blaming Cambodia for a land mine explosion that wounded Thai troops — a claim Cambodia rejected.
Malaysian Prime Minister Anwar Ibrahim, whose country is this year’s chair of regional bloc the Association of Southeast Asian Nations, took to social media on Monday to call on both sides to “exercise maximum restraint.” Noting that Thailand and Cambodia are key members of ASEAN, he said the region “cannot afford to see long-standing disputes slip into cycles of confrontation.”
