Follow NBC News' coverage as Israel and Hezbollah clash in Lebanon, Israel responds to Iran's missile attack and strikes hit Beirut.

Israeli forces and Iran-backed Hezbollah fighters have engaged in fighting on the ground in southern Lebanon, after Iran launched its largest-ever attack on Israel on Tuesday. Follow for live updates.

One strike occurred around midnight local time in the heart of central Beirut, close to the Lebanese parliament building. It is rare for Israel to bomb the center of the capital, with most recent attacks occurring in the southern suburbs.