June 19 (UPI) -- Thailand's Ministry of Foreign Affairs announced Thursday that it will hand a letter of protest to Cambodia's government after a call between the two countries was allegedly leaked by a high-profile Cambodian official.

In a press release, the Thai agency said "These actions taken by the Cambodian side are totally unacceptable. It is a breach of diplomatic etiquette, a serious violation of trust, and undermines conduct between two neighboring countries."

The protest comes after Cambodian Senate President Samdech Hun Sen posted a call between himself and Thai Prime Minister Paetongtarn Shinawatra on Facebook Wednesday. The conversation took place Sunday and Paetongtarn allegedly criticized the Thai military and called Hun Sen "uncle."

The call was held to discuss the ongoing border dispute between the nations, which has led to some conflict and the death of a Cambodian soldier last month.

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