BANGKOK, June 28, (AP): Hundreds of protesters gathered in Thailand’s capital on Saturday to demand the resignation of Prime Minister Paetongtarn Shinawatra, part of the brewing political turmoil set off by a leaked phone call with former Cambodian Prime Minister Hun Sen. Paetongtarn faces growing dissatisfaction over her handling of a recent border dispute with Cambodia involving an armed confrontation May 28.

One Cambodian soldier was killed in a relatively small, contested area. The recorded phone call with Hun Sen was at the heart of the demonstration Saturday and has set off a string of investigations in Thailand that could lead to Paetongtarn’s removal. Outrage over the call mostly revolved around Paetongtarn telling Hun Sen, the current Cambodian Senate president, not to listen to "an opponent” in Thailand.

It’s believed to be a reference to the regional Thai army commander in charge of the area where the clash happened, who publicly criticized Cambodia over the border dispute. Protesters held national flags and signs as they occupied parts of the streets around the Victory Monument in central Bangkok. At a huge stage set up at the monument, speakers expressed their love for Thailand following the intensified border dispute.

Many of the leading figures in the protest were familiar faces from a group popularly known as Yellow Shirts, whose clothing color indicates loyalty to the Thai monarchy. They are longtime foes of Paetongtarn’s father, former Prime Minister Thaksin Shinawatra, who reportedly has a close relationship with Hun Sen. Yellow Shirts rallies turned violent and led to military coups in 2006 and 2014, which respectively ousted the elected governments of Thaksin and Paetongtarn’s aunt, former Prime Minister Yingluck Shinawatra.

Hun Sen on Saturday vowed to protect his country’s territory from foreign invaders and condemned what he called an attack by Thai forces last month. At a 74th anniversary celebration of the foundation of his long-ruling Cambodian People’s Party, Hun Sen claimed the action by the Thai army was illegal when it engaged Cambodian forces. He said the skirmish inside Cambodian territory was a serious violation of country’s sovereignty and territorial integrity, despite Cambodia's good will in attempting to resolve the border issue.

"This poor Cambodia has suffered from foreign invasion, war and genocide, been surrounded and isolated and insulted in the past, but now Cambodia has risen on an equal face with other countries. We need peace, friendship, cooperation and development the most and we have no politics and no unfriendly stance with any nation,” Hun Sen said in front of thousands of party members at the event in the Cambodian capital, Phnom Penh.