BANGKOK — Thailand’s Prime Minister Paetongtarn Shinawatra faced growing calls for her resignation in a deepening political crisis set off by a leaked recording of her negotiating with Cambodia’s former leader in the two nations’ latest border dispute.

In the leaked recording, the 38-year-old Thai leader refers to Hun Sen as "Uncle", and labels a senior Thai military officer stationed at the border an "opponent".

Paetongtarn Shinawatra defends her ‘sympathetic remarks and softer tone’ during phone call as part of negotiation strategy to ease border tensions

The reescalation of conflict was sparked on May 28, when a Cambodian soldier was killed in an early morning clash between both nations’ troops, in an area called the Emerald Triangle—the shared border between Thailand, Cambodia, and Laos. The area remains disputed as both Thailand and Cambodia lay claims to parts of the region.

Tens of thousands of Cambodians take to the streets of Phnom Penh for an official rally to support the government's actions in its recent border dispute with Thailand. The march follows the death of a Cambodian soldier last month when troops exchanged fire in a disputed area where the borders of Cambodia,