Haftar is supported by the United Arab Emirates, Egypt and Russia, while the government is backed by Turkey.
The Israeli-Palestinian conflict is at a “watershed moment,” Guterres said.
Iran’s mission to the United Nations in New York did not immediately respond to a request for comment on the U.N. report.
'I renew my call for Israel to adhere to its obligations under relevant Security Council resolutions and immediately cease its overflights above Lebanese airspace.'
"We will never forget, We will stand firm every day and everywhere against antisemitism," said UN Secretary-General
US Secretary of State Mike Pompeo spoke with Prime Minister Benjamin Netanyahu, the United Nations and Abu Dhabi Crown Prince Mohammed bin Zayed Al Nahyan of the UAE about the attacks.
Ambassador Danny Danon said, “We know that it might happen again,” about the Holocaust.
"The Secretary-General urges all parties concerned to cooperate with the board once it has been established," UN spokesman Stephane Dujarric said.
United States is generally required to allow access to the United Nations for foreign diplomats. But Washington says it can deny visas for "security, terrorism, and foreign policy" reasons.
Skirmishes have already broken out as fighters from Khalifa Haftar's eastern-based Libyan National Army (LNA) move westwards.