Lebanon's Hezbollah said on Wednesday it fired a rocket targeting Mossad spy agency headquarters near Tel Aviv, which it blamed for the assassination of its leaders and the blowing up communications devices used by its members, in a new escalation that moved the arch-foes closer to full-fledged war.
Warning sirens sounded in Israel's economic capital Tel Aviv as a single surface-to-surface missile was intercepted by air defence systems after it was detected crossing from Lebanon, the Israeli military said.
There were no reports of damage or casualties and the military said there was no change to civil defence instructions for central Israel.
Warning sirens also sounded in other areas of central Israel, including the city of Netanya.
The Iranian-backed Hezbollah movement in Lebanon fired hundreds of missiles and rockets at Israel in recent days as months of conflict across the border with southern Lebanon has intensified sharply.
The Israeli military has been conducting its heaviest air strikes of the war this week, targeting Hezbollah leaders and hitting hundreds of targets deep inside Lebanon.
On Tuesday, a strike in Beirut killed senior Hezbollah commander Ibrahim Qubaisi, who headed the group's missile and rocket force
He is one of several key figures who have been assassinated since fighting broke out between Israel and Iran-backed Hezbollah nearly a year ago in parallel with the Gaza war.
Israel's offensive since Monday morning has killed 569 people, including 50 children, and wounded 1,835 in Lebanon, Health Minister Firass Abiad told Al Jazeera Mubasher TV.
A new offensive against Hezbollah has stoked fears that conflict between Israel and the militant Palestinian group Hamas in Gaza is widening and could destabilise the Middle East.
The U.N. Security Council said it would meet on Wednesday to discuss the conflict.
"Lebanon is at the brink. The people of Lebanon – the people of Israel – and the people of the world - cannot afford Lebanon to become another Gaza," U.N. Secretary General Antonio Guterres said.
Half a million people are estimated to have been displaced in Lebanon, said Lebanon's Foreign Minister Abdallah Bou Habib. He said Lebanon's prime minister hoped to meet with U.S. officials over the next two days.
In Beirut, thousands of displaced people who fled from southern Lebanon were sheltering in schools and other buildings.
Israel's military said its airforce conducted "extensive strikes" on Tuesday on Hezbollah targets across southern Lebanon, including weapons storage facilities and dozens of launchers that were aimed at Israeli territory.
Israeli Defence Minister Yoav Gallant said the attacks had weakened Hezbollah and would continue. Hezbollah "has suffered a sequence of blows to its command and control, its fighters, and the means to fight. These are all severe blows," he told Israeli troops.
