Iran's Islamic Revolutionary Guards threatened Saturday to target U.S. sites in the Middle East if its tankers come under fire, Iranian media reported, as Washington was left waiting for Tehran's response to its latest negotiating position.

Iran's army warned on Sunday that countries complying with U.S. sanctions against the Islamic republic would face difficulties crossing the Strait of Hormuz.

An unknown projectile struck a ship off the coast of Qatar early Sunday morning, a UK maritime agency reported, after Iran's Islamic Revolutionary Guards threatened to target U.S. vessels in the region.

The Israeli military called on residents of more than half a dozen villages in southern Lebanon to immediately evacuate on Saturday ahead of expected attacks against alleged Hezbollah targets despite a truce with Lebanon intended to halt the fighting.

Hezbollah said it launched missiles and drones at military bases in Israel in retaliation for a recent attack on Beirut's southern suburbs and ongoing strikes in the south, where Lebanese authorities reported 11 people killed on Friday.

Israeli strikes on Friday killed 10 people in four locations in southern Lebanon, the health ministry said, raising an earlier toll.

U.S. President Donald Trump said Friday that he was expecting Iran's response to Washington's latest proposal on a deal to ending the Middle East war by "tonight."

Russian President Vladimir Putin said Saturday that his soldiers in Ukraine were fighting an "aggressive force" backed by all of NATO, and that the Russian army's cause was "just", as he addressed an annual Victory Day parade on Red Square.

U.S. President Donald Trump announced a three-day ceasefire between Ukraine and Russia starting Saturday, saying he hoped it could lead to long term deal to end Moscow's war.

A U.S. fighter jet disabled two Iranian-flagged tankers to enforce a port blockade on Friday, prompting retaliatory attacks and rattling a shaky truce as Tehran weighed Washington's latest proposal to end the Middle East war.