President Michel Aoun on Sunday described U.S. President Donald Trump’s decision to recognize Syria’s occupied Golan Heights as part of Israel as a “threat” to Lebanon’s sovereignty.

“Trump’s decision does not only threaten the sovereignty of a brotherly country, but also the sovereignty of the Lebanese state, especially in the Shebaa Farms and the Kfarshouba Hills,” Aoun warned in his speech before the 30th Arab Summit in Tunisia.

Israel had argued that the Shebaa Farms and the Kfarshouba Hills are part of the Golan whereas Lebanon has insisted that they belong to Lebanon, amid a dispute over the demarcation of the border in that area.

Separately, Aoun wondered whether the international community is seeking to turn the Syrian refugees into “hostages” in order to “use them as a tool of pressure against Syria and Lebanon.”

“We’re worried over the insistence to link the refugee return to the political solution and over the ‘voluntary return’ expression,” the president added.

He also emphasized that Lebanon “will not accept any form of naturalization” on its soil.