U.S. Secretary of State Marco Rubio on Monday voiced hope for working with elements within Iran's government, saying the United States privately had received positive messages, AFP reported.

Rubio said there were internal "fractures" inside Iran and that the United States hoped that figures with "power to deliver" take charge.

The Israeli military on Monday said a soldier was killed a day earlier in combat in southern Lebanon, bringing to six the number of troops killed since fighting with Hezbollah started earlier in March.

"Sergeant Liran Ben Zion, aged 19, from Holon... fell during combat in southern Lebanon," the military said. An officer was also severely wounded.

Syria's military said a large-scale drone attack targeted its bases near the border with Iraq on Monday, the latest such incident since the outbreak of the Middle East war.

In a statement, the army reported "a large-scale attack by a number of drones targeting several army bases near the Iraqi border at dawn today", adding that most of the drones were intercepted.

Armed with thick gloves and small plastic crates Kamal, Khalil and Reem jump on two mopeds and head into Beirut's southern suburbs, which see almost daily strikes by Israeli aircraft.

Hands scarred by a thousand bites and scratches, the small rescue team from Lebanese NGO Animals Lebanon uses two-wheelers to navigate streets made narrow by piles of rubble as they search for trapped animals.

An Israeli strike on an ambulance belonging to the Hezbollah-affiliated Islamic Health Committee killed one paramedic and his patient Sunday, the group’s spokesperson said.

The incident came a day after at least nine first aid workers were killed by Israeli strikes on the south and, according to the Lebanese health ministry, some 47 have been killed since the war began.

An Israeli airstrike on a residential building near Beirut's southern suburbs killed at least three Hezbollah members on Monday, a security source told AFP.

The strike "targeted an office used by Hezbollah, killing three members and seriously wounding three others" in a residential building in al-Rihab on the edges of Dahieh. The region has not been evacuated and several people were injured.

The U.N. force in Lebanon said Monday that one of their peacekeepers was killed when a projectile hit one of their positions, where Israeli forces are fighting Hezbollah.

Indonesia confirmed on Monday that one of its peacekeepers was killed in Lebanon.

Lebanon's health ministry said on Sunday that Israeli strikes had killed 1,238 people in the country since the start of the latest war with Hezbollah on March 2.

Iran's ambassador will not leave Lebanon despite being declared persona non grata and ordered to leave the country by Sunday, an Iranian diplomatic source told AFP.

"The ambassador will not leave Lebanon, in accordance with the wishes of the speaker of parliament Nabih Berri and of Hezbollah," the source said, speaking on condition of anonymity.

The American University of Beirut on Sunday said it would operate remotely over the next two days, following the Iranian Revolutionary Guards' threat to target U.S. universities in the region.