At least 80 troops from Yemen's secessionist Southern Transitional Council (STC) have been killed in fighting with Saudi-backed forces and strikes since Friday, a military official from the group told AFP on Sunday.

The United Nations Interim Force in Lebanon said gunfire from an Israeli position hit close to its peacekeepers twice on Friday, reporting no casualties but decrying a "concerning trend".

UNIFIL has repeatedly reported Israeli fire near or towards its personnel in recent months, and last week said an Israeli attack near one of its positions lightly wounded a peacekeeper.

Russia condemned the U.S. military action in Venezuela on Saturday, saying there was no tenable justification for the attack and that "ideological hostility" had prevailed over diplomacy.

Saudi-backed troops on Saturday made advances in Yemen's resource-rich Hadramawt province, military officials said, as confrontations between forces backed by Riyadh and Abu Dhabi have triggered a deep rift between the two Gulf allies.

Supreme leader Ayatollah Ali Khamenei on Saturday acknowledged the economic demands of Iranian protesters, while warning against what he described as rioting.

U.S. President Donald Trump said Saturday that U.S. forces had captured Venezuelan leader Nicolas Maduro after launching a "large scale strike" on the South American country.

"The United States of America has successfully carried out a large scale strike against Venezuela and its leader, President Nicolas Maduro, who has been, along with his wife, captured and flown out of the Country," Trump said on Truth Social, around two hours after explosions rocked Venezuela's capital Caracas.

The Ukrainian army said Friday it only hit "military targets", a day after Russia accused Kyiv of firing drones at a hotel and cafe in Ukraine's occupied south, killing 27 people.

Russian-installed authorities in Ukraine's southern Kherson region said those killed were revellers celebrating the New Year and that two of the dead were children, describing the incident as a "terrorist act".

Airstrikes killed seven people in Yemen on Friday as a Saudi-led coalition attacked UAE-backed separatists who have seized huge swathes of territory, an official for the group.

More than 20 people were also wounded as seven airstrikes hit a camp in Al-Khasah, said Mohammed Abdulmalik, head of the separatist Southern Transitional Council in Wadi Hadramaut and Hadramaut Desert.

A top Iranian security official on Friday warned U.S. President Donald Trump against intervening in protests gripping the country, saying it would "destabilize the entire region".

"Trump should know that any American interference in this internal matter would amount to destabilizing the entire region and harming American interests," Ali Larijani, who heads Iran's highest security body said.

President Donald Trump said Friday that the United States is "locked and loaded" to respond if Iran kills protesters, after cost-of-living demonstrations in the country turned deadly.

Protesters and security forces clashed in several Iranian cities Thursday with six reported killed in the first deaths since the unrest escalated.