Lebanon's civil defense agency said early on Sunday its regional facility in the southern city of Nabatieh had been destroyed by an Israeli strike.

Israel struck south Lebanon on Saturday despite a ceasefire as Hezbollah said its backer Tehran had pledged not to abandon the militant group.

Pakistan's Prime Minister Shehbaz Sharif said on Sunday he hoped his country could soon host the next round of peace talks between Iran and the United States.

The United States and Iran could strike a deal to end the Middle East war as early as Sunday, Washington's top diplomat said, while Tehran insisted the agreement would do nothing to limit its nuclear program.

A gunman opened fire near the White House on Saturday evening, with U.S. Secret Service agents killing the assailant in a shoot-out during which a bystander was also struck, authorities said.

Israel staged fresh airstrikes in Lebanon on Saturday after earlier raids killed 10 people, according to media and the government in Beirut, targeting an area near the Syrian border.

The U.S. announced unprecedented sanctions on two Lebanese officers on Thursday, accusing them of sharing intelligence with Hezbollah, which the Lebanese government is trying to disarm.

Tehran accused the United States of "excessive demands", Iranian media said on Saturday, as U.S. media reports raised the prospect that Washington was mulling new strikes and leaders of the Islamic republic considered the latest peace proposal.

Italy, France, Britain and Germany urged Israel on Friday to stop expanding its settlements in the West Bank, condemning settler violence and warning construction companies not to bid for tenders.

"We call on the government of Israel to end its expansion of settlements and administrative powers, ensure accountability for settler violence and investigate allegations against Israeli forces," said the countries in a joint statement, noting that violence against Palestinians by settlers was at "unprecedented levels".

Lebanon's military said Friday its soldiers were loyal to the institution after the U.S. announced sanctions that included an officer accused of sharing information with Hezbollah.

The sanctions came after the U.S. hosted three rounds of direct talks between Lebanon and Israel aimed at ending the war that began after Hezbollah attacked Israel on March 2 and determining the future of relations between the two countries.