Israel launched a series of strikes in Lebanon early on Saturday, the Israel Defense Forces (IDF) said, amid a further wave of attacks from Hezbollah and Iran.

"The IDF has begun striking Hezbollah infrastructure sites in Beirut," the military said in a statement on Telegram.

Lebanon's National News Agency (NNA) reported an Israeli drone attack that caused two deaths in the south of the country.

The Lebanese Health Ministry reported 11 people injured in overnight Israeli air attacks in the south. A hospital had been damaged, it said.

There was no immediate comment from the Israeli military on either report.

Eyewitnesses in Beirut reported a total of seven Israeli attacks in the capital's densely populated southern suburbs, an area seen as a stronghold of the Iranian-backed Hezbollah militia. There were no initial reports of casualties.

The Israeli military has repeatedly called on the population to leave the area.

Air-raid warnings were heard in northern Israel early on Saturday after Hezbollah fired projectiles. Israeli media reported damage to cars and houses from a rocket exploding near the border.

Hezbollah claimed responsibility for a number of attacks.

The Israeli military has also accused Hezbollah of being responsible for an attack on Friday on a UN military observer post in which three soldiers were wounded, some of them seriously.

The United Nations Interim Force in Lebanon (UNIFIL) mission has been monitoring the border region since 1978.

Rockets fired on Israel from Iran

People in the coastal metropolis of Tel Aviv had to take shelter in safe rooms around midday on Saturday as police reported several impacts from suspected Iranian rocket fire.

Four people were injured, according to Israel's Magen David Adom emergency service.

Israeli media reported that homes in suburbs of Tel Aviv were badly damaged.

Iran again used cluster munitions, which are internationally widely ostracized, in the missile attack, the reports said.

Israeli media also reported that a drone launched by the Houthi militia from Yemen was intercepted on its way to the city of Eilat.

The Israeli military further recorded multiple rocket attacks from Iran overnight.

"Search and rescue forces, both reserve and regular forces, are on their way to sites in central Israel where reports of impact have been received," the IDF said.

Attacks on Iran's Bushehr nuclear plant and Tehran

An airstrike near the Bushehr nuclear power plant has killed a plant security officer and damaged a building on the site in The Gulf, Iran's official IRNA news agency reported on Saturday.

IRNA reported that the projectile had struck near a fence around the site and that there had been no damage to the main parts of the power plant. The International Atomic Energy Agency (IAEA) said the Iranian authorities had informed it of the attack.

There have now been four attacks near the power plant since the war started on February 28, according to Iranian reports.

The facility, Iran's sole nuclear power plant, lies around 760 kilometres south of Tehran. Russia's Rosatom is currently building a second block at the facility, which has been in operation since 2011.

Separately, Iran's semi-official Tasnim news agency reported airstrikes on the Mahshahr Special Petrochemical Zone at the head of The Gulf. It reported three strikes and large explosions, citing the governor's office.

The companies Fajr 1 and 2, Rijal and Amirkabir had been hit, the agency, which is linked to the Islamic Revolutionary Guard Corps (IRGC), said, adding that deaths and injuries were likely.

The Israeli military declined to comment on the report.

Tasnim reported that a complete evacuation of all active industrial units in the region had been ordered.

The Israeli military reported attacks on Friday on Iranian leadership facilities in Tehran that targeted air defences and arms production. Residents in the north and west of the city reported explosions.

Attack on Iran-Iraq border crossing

Tasnim further reported that the border crossing at Shalamcheh near the city of Khorramshahr near the border with Iraq had been hit by a US-Israeli strike that caused severe damage. Shalamcheh is a major trade crossing.

Iraq's INA state news agency reported that one person had been killed and five injured in the attack, and that the crossing had been closed to all traffic.

Attacks around The Gulf

In retaliation for the US-Israeli attacks launched on February 28, Iran has also targeted Gulf countries it considers US allies.

Overnight, residents in Bahrain were urged to seek shelter while in Dubai debris from aerial interceptions fell onto the facade of buildings in two separate incidents. There were no reported injuries, officials said.