By Maya Gebeily BEIRUT, March 13 (Reuters) - Israel has rebuffed a historic offer of direct talks from Lebanon, deeming it too little too late from a government that shares its goal of disarming Hezbollah but cannot act against the heavily armed Lebanese group without risking a civil war.

Israel destroyed a bridge in southern Lebanon on Friday and dropped leaflets in Beirut threatening Gaza-scale devastation as it deployed more troops to fight Iran-backed Hezbollah and warned of more attacks on the country's infrastructure.

The Lebanese parliament has extended its term by two years due to the U.S.-Israel war with Iran, which has pushed the region into an escalating conflict, and Israel stepped up its attacks on Lebanon.

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.

A humanitarian crisis is looming in Lebanon where more than 750,000 people have been displaced since the U.S. and Israel began their war with Iran.

Nearly 800,000 people in Lebanon have fled their homes as violence surges across the country amidst the Middle East conflict.