Israel and Iran have begun a new round of attacks, as the conflict between the two heavily armed rivals enters its fourth day.

Iran launched missiles at Israeli cities Monday after Israeli strikes deep inside the Islamic republic, raising Israel's death toll by 11 on day four of an escalating air war.

As missile exchanges escalate, conflicting accounts emerge over Washington’s role in Israel’s assault on Iran’s nuclear infrastructure, according to a report

Israel and Iran exchanged fire for the fourth consecutive day on Monday, stoking fears of an all-out war with the potential to drag in others in the oil-rich region and force the US into a more hands-on stance.

On Saturday, residents in Tehran reported hearing explosions, and the Iran air defense fired nonstop rounds in the Pastour neighborhood. Precise casualty figures in Iran could not be confirmed. But Iran’s U.N. ambassador, Amir Saeid Iravani, told the U.N. Security Council that Israel’s strikes in Iran had killed 78 people and injured 329 others.

Trita Parsi, vice president of the Quincy Institute for Responsible Statecraft, has insisted that Israel underestimated the Iran's ability to regroup

Israeli strikes have killed at least four senior Islamic Revolutionary Guard Corps commanders, including Hossein Salami.

US President Donald Trump on Sunday urged Iran and Israel -- who are locked in an exchange of military strikes -- to "make a deal," but suggested they might need

The Iran regime is very weak,” Israeli Prime Minister Benjamin Netanyahu said in a television interview. Israeli struck energy facilities and government buildings Sunday.