Iran live updates: Trump calls on Israel, Iran to 'immediately' stop attacks

Iran fired on Israel following Israeli strikes in the Lebanese capital Beirut.

President Donald Trump announced "major combat operations" against Iran on Feb. 28, with massive joint U.S.-Israeli strikes targeting military, government and infrastructure sites.

Following the announcement of a two-week ceasefire, initial U.S.-Iran talks in Pakistan in April failed to reach a peace deal.

Trump later announced the open-ended extension of the ceasefire and the continuation of a U.S. blockade until negotiations are concluded "one way or the other."

Sadegh Larijani, the head of Iran's Expediency Discernment Council and the brother of slain senior official Ali Larijani, said on Monday that Tehran's attacks on Israel "in defense of Lebanon" indicate "the formal declaration of a strategic doctrine."

Larijani said the Iranian attacks "sent a clear message that if one side of the Axis of Resistance is attacked, it will trigger a response that extends beyond geographical borders and will change the region's equations," as quoted by the semi-official Tasnim News Agency.

The Axis of Resistance refers to the Iranian-led grouping of militias spread around the Middle East through which Tehran has traditionally sought to build deterrence against and erode the influence of Israel, the U.S. and their regional partners. Lebanese Hezbollah is a key part of the axis.

President Donald Trump posted to social media on Monday morning demanding that Israel and Iran "immediately stop 'shooting.'"

Several airports across Iran suspended or cancelled flights on Monday, as airspace restrictions and heightened security measures were introduced amid renewed Israeli airstrikes in several parts of the country.

The airports in Shiraz in central Iran, Kermanshah in the west and Mashhad in northeast were among those to announce flight cancellations and suspensions on Monday, according to semi-official Iranian news agencies ISNA and Mehr.

Iranian state television said on Monday that Tehran came under renewed Israeli attack after reports of massive explosions in several areas of the capital.

State television said Israeli strikes hit areas in the south, east and west of Tehran, adding that air defenses targeted several drones.