What began with Israeli strikes on Iranian nuclear facilities and other targets has now spiraled into the world’s first full-scale example of what is a “threshold war”.

Hours after a top Iranian military official on Monday claimed that Pakistan has assured launching a nuclear attack against Israel if the latter dropped a nuclear bomb on Iran, a shaken Islamabad termed the news as "fake" which it said has even been carried by the British press.

Despite stunning early successes in Israel’s unprecedented strikes on Iran, a weekend of intensive bombardment and retaliation is raising questions about Israel’s exit strategy – how it can end this conflict with its ambitious goals achieved.

Iran will take even tougher action against Israel if attacks escalate President Masoud Pezeshkian warned during a cabinet meeting in Tehran on Sunday. He spoke after both sides launched fresh attacks on each other overnight into Sunday.

U.Sroadcast and cable networks went to special reports Thursday for Israel's attack on Iran, with reports that nuclear sites were targeted.

The situation has escalated as Israel carried out targeted airstrikes on Iranian military sites and commanders to hinder Iran’s military strength and nuclear ambitions. Iran responded with missile strikes and warnings of retaliation,

Experts suggest the U.S. has a strategic opportunity to leverage Iran's weakened position for a nuclear deal after Israel's targeted strikes on Iranian nuclear and military sites.

President Donald Trump vetoed a plan presented to the U.S. in recent days to kill Iranian supreme leader Ayatollah Ali Khamenei, according to a U.S. official familiar with the matter