Ukraine's President Volodymyr Zelensky started a second day of talks with U.S. negotiators in Berlin on Monday, a senior Ukrainian official told AFP, as diplomatic efforts to end the war intensify.

The official told AFP the second day of talks had started, after Zelensky's delegation huddled for more than five hours on Sunday with Trump's special envoy Steve Witkoff and the U.S. president's son-in-law Jared Kushner on ending the conflict unleashed by Russia's 2022 invasion.

The Kremlin on Monday called Kyiv's non-NATO status a "cornerstone" in talks to end the war, after Ukrainian President Volodymyr Zelensky admitted some of the alliance's members were against his country joining the bloc.

"This issue is one of the cornerstones and requires special discussion," spokesman Dmitry Peskov told journalists, including AFP, during a daily briefing.

A senior adviser to Iran's supreme leader said Sunday that the country would "resolutely support" Hezbollah, its ally in Lebanon, in the group's efforts to confront Tehran's regional foe Israel.

The remarks by Ali Akbar Velayati came as Lebanon faces pressure from the United States and Israel to disarm Hezbollah, which engaged in more than a year of hostilities with Israel following the outbreak of the Gaza war.

The Israeli military said it killed three Hezbollah members in strikes Sunday on southern Lebanon, where it has carried out repeated attacks despite an ongoing ceasefire with the Iran-backed group.

The Lebanese health ministry said three people were killed in strikes in the Yater, Safad Al-Battikh and Jwaya areas of the south.

The Israeli military said it would "temporarily" suspend a strike planned for Saturday that was intended to target what it described as Hezbollah military infrastructure in southern Lebanon.

Syria's interior ministry said on Sunday that the gunman who killed three Americans in the central Palmyra region the previous day was a member of the security forces who was to have been fired for extremism.

Hamas' Gaza chief Khalil al-Hayya said on Sunday that the group had a "legitimate right" to hold weapons and that any proposal for the next phases of the Gaza ceasefire must uphold that right.

Two suspected shooters opened fire at Sydney's iconic Bondi Beach on Sunday, killing nine people and wounding multiple others in an attack that spread panic, with bodies reported lying on the ground.

U.S. President Donald Trump's special envoy will meet with Volodymyr Zelensky and other European leaders in Berlin this weekend, the White House said, as Washington presses for a plan to end Russia's war with Ukraine.

Turkish President Recep Tayyip Erdogan on Saturday warned that the Black Sea should not turn into an "area of confrontation" between Russia and Ukraine, after several strikes in recent weeks.