Iran has launched aerial drones at Israel, appearing to mark a widely anticipated reprisal attack.
Israeli television said the salvo was supposed to arrive at Israel at 02:00 on Sunday (23:00 GMT on Saturday).
Iran's Progressive Watchmen said they had sent Missiles as well as "at explicit targets".
The Israel Guard Powers (IDF) said they were on guard and "checking all objectives". Israel's excellent minster met a gathering of his conflict bureau.
Israel, Lebanon and Iraq have shut their airspaces, and Syria and Jordan have placed their air protections on alert.
Iran had promised to fight back for an assault on its department in Syria on 1 April which killed seven military officials, including a top leader.
LIVE: Iran dispatches drones at Israel in retaliatory assault
It blamed Israel for completing that assault. Israel neither affirmed nor denied it.
In no time before insight about Iran's robot dispatches, Israeli State leader Benjamin Netanyahu said his country's "protective frameworks" were conveyed.
"We are prepared for any situation, both protectively and unpleasantly. The Territory of Israel is solid. The IDF is solid. The general population is solid.
"We value the US remaining close by Israel, as well as the help of England, France and numerous different nations."
After news broke of the assault, US Public safety Chamber representative Adrienne Watson said: "President Biden has been clear: our help for Israel's security is ironclad."
"The US will remain with individuals of Israel and backing their safeguard against these dangers from Iran."
UK State leader Rishi Sunak denounced Iran's "crazy" assault, promising that the UK would "keep on defending Israel's security and that of all our territorial accomplices".
Iran's Islamic Upheaval Watchman Corps (IRGC) - the most impressive part of its military - said it had sent off the assault "in counter against the Zionist system's [Israel] rehashed violations, remembering the assault for the Iranian international safe haven's department in Damascus".
