Prime Minister Benjamin Netanyahu will address the United Nations General Assembly on Thursday.
Israel's Ambassador to the UN, Danny Danon, welcomed Netanyahu and his wife Sara before the PM took the stage.
Protests were reported outside the UN Headquarters against Netanyahu's presence at the gathering of world leaders.
Several protesters were arrested by the New York Police Department for causing disruptions outside UN HQ.
Among those arrested was anti-Zionist movie star Susan Sarandon, Walla learned.
Before his speech, Netanyahu met with Greek Prime Minister Kyriakos Mitsotakis on the sidelines of the UNGA.
Netanyahu "emphasized the importance of the strategic partnership between the countries for regional stability and welcomed Greece's selection of Israeli defense systems," the Prime Minister's Office said.
Netanyahu and Mitsotakis discussed "regional developments, energy cooperation, and the advancement of another tripartite summit with Cyprus," the PMO added.
Netanyahu also met with Slovenian Prime Minister Janez Janša on the UNGA sidelines, the PMO confirmed.
He thanked Janša for the opening of the Israeli embassy in Ljubljana and his "steadfast support for Israel, which has led to a turnaround in bilateral relations," the PMO said.
The two leaders "discussed opportunities to deepen cooperation between the two countries in various fields."
Netanyahu invited Janša to visit Israel, the PMO noted.
The PM's official airplane, Wing of Zion, landed at a military airport earlier on Thursday, where the Netanyahus were greeted by representatives of the US Air Force on the tarmac.
This is a developing story.