There were no immediate reports of casualties, though the Israeli Defense Forces said a number of hits have been confirmed.
Watch in full Euronews correspondent Anelise Borges' exclusive interview with Prime Minister Saad Hariri.
Unofficial results are showing that Hezbollah and its political allies made significant gains.
They appear to have won just over half of all parliamentary seats.
Hezbollah does well in Sunday's parliamentary election but it does not give them overall power as Prime Minister Saad Hariri is likely to form a new coalition.
Less than half the electorate voted in a poll that strengthens Hezbollah and pro-Iranian forces, and saw the return of major pro-Assad figures, but Prime Minister Hariri is expected to stay on.
Party faithful celebrate first election for nine years in Lebanon as all sides await official results
Angry protests in Lebanon after the foreign minister refers to parliament's speaker as a "thug"
U.S. and Israeli flags have been burnt outside the American embassy in Beirut, with police firing tear gas and water canons at protesters
Lebanon's Saad al-Hariri has agreed to put his resignation as PM on hold after a meeting with the country's president
Saturday's meeting will mark Hariri's first trip outside Saudi Arabia since resigning as Lebanese PM
President Macron tries to diffuse tensions in the Middle East and invites Lebanon's ex-premier to France
Lebanon's prime minister, Saad al-Hariri has spoken out for the first time since his resignation a week ago, saying he would return to his country within days.
Saudi Arabia has opened a new front in its proxy war with Iran, threatening Tehran’s ally Hezbollah and its home country Lebanon.
Saad al-Hariri, prime minister of Lebanon, has resigned, attacking Iran and Hezbollah and saying his "life is in danger".