BANGKOK - Thailand's Bhumjaithai Party, the second-largest partner in the ruling coalition, announced its withdrawal from the government led by Prime Minister Paetongtarn Shinawatra on Wednesday.

The decision follows widespread backlash over a leaked phone call between Paetongtarn and Cambodia's Senate President Samdech Techo Hun Sen amid escalating border tension between the two Southeast Asian nations.

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In a statement, the Bhumjaithai Party said its executive board convened and unanimously agreed to exit the government. All of the party's ministers have tendered their resignations to the prime minister, effective from Thursday.

"Bhumjaithai has called on Prime Minister Paetongtarn to take responsibility for making the country lose its dignity, honor, and respect for the people and the armed forces," the party said.

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The party stands ready to cooperate with the Thai people, support the army, and assist all officials safeguarding Thailand's sovereignty, territory, and national interests by every possible means, the statement said.

Border tensions between Thailand and Cambodia have mounted recently after soldiers of both countries briefly exchanged gunfire in a disputed border area, resulting in the death of a Cambodian soldier.