JERUSALEM: Israel was on high alert Sunday after Iran's unprecedented missile and drone attack drew an international chorus of condemnation and sparked fears of a broader conflict.

Iran launched its first-ever direct assault on Israeli territory late Saturday in retaliation for a deadly Damascus strike, marking a major escalation of the long-running covert war between the regional foes.

Iranian President Ebrahim Raisi warned Israel against a "reckless" retaliation, saying one would be a met with "a decisive and much stronger response."

Iran said Saturday's assault was itself a response to the April 1 air strike on Tehran's consulate building in the Syrian capital that has been widely blamed on Israel.

It remained unclear how Israel would respond. Israeli Defense Minister Yoav Gallant said that "the campaign is not over yet — we must remain alert."