Supporters of Lebanon's Prime Minister-designate Saad Hariri are trading gunfire with rivals in the streets of Beirut, Lebanese security officials said on Sunday evening.
The officials had no information on casualties, but Al-Arabiya TV reported that a woman was killed and three were wounded.
Sunday's fighting was between supporters of Western-backed Sunni politician Hariri and rival followers of the Hizbullah-allied Shiite parliament speaker.
The officials said Lebanon's army sent troops to the area to try to restore calm.
Hariri was named by Lebanon's president to become the next prime minister after the June 7 election.