Thai Prime Minister Paetongtarn Shinawatra faced mounting calls Thursday to resign after a leaked phone call she had with former Cambodian leader Hun Sen provoked widespread anger and prompted a key coalition partner to quit.

Bhumjaithai, the second-largest party in her ruling coalition, quit the alliance on Wednesday after the leaked phone call, dealing a major blow to her Pheu Thai party's position in parliament. The coalition now holds a slim parliamentary majority - which will be lost if more of its partners decide to leave.

Thailand’s government faces potential collapse after Prime Minister Paetongtarn Shinawatra’s leaked phone call unleashed fresh political turmoil, with the leader now facing calls to resign as she grapples with the exit of the second-biggest party in her coalition.