By Emma Farge GENEVA, March 13 (Reuters) - Over an eighth of Lebanon's territory is under Israeli orders for people to leave their homes, an aid group said on Friday, while the United Nations peacekeeping mission said Israeli ground troops were making incursions and erecting roadblocks.

An Israeli strike in southern Lebanon killed a dozen medical staff at a clinic, Lebanese health authorities said Saturday, after Iran-backed Hezbollah’s leader said his group was ready for a long confrontation with Israel.

The suspected armed attacker who authorities say rammed his car into a Michigan synagogue was a Lebanese-born American citizen.

The war is expanding into Lebanon, as an Israeli offensive to dismantle Hezbollah has displaced 800,000 people there, with more than 680 people killed.

Ayman Ghazali, 41, a restaurant worker in Dearborn Heights, is accused of driving his truck into the synagogue and opening fire.

The BBC visited the city of Nabatieh, witnessing the pace and scale of Israel's bombing as its war with Hezbollah continues to escalate.

Hezbollah fired 200 missiles and drones into Israel in what Israeli media called an integrated attack with Iran, prompting fierce Israeli Defense Forces strikes.