Clashes broke out overnight on Monday. Gunfire was exchanged after the funeral of an assassinated Lebanese intelligence chief. Angry mourners were said to have stormed the offices of Prime Minister Najib Mikati, according to sources on the ground. Many showed up in downtown Beirut's Martyrs' Square for Hassan's funeral.
Opposition leaders accuse Syria of being behind the car bombing that killed Brigadier General Wissam al-Hassan on Friday. Mikati is closely aligned with Syrian President Bashar al-Assad and his Lebanese ally, Iranian proxy Hizbullah.
Opposition leaders demand that Mikati step down.
Opposition leader Saad al-Hariri urged supporters not to use excessive violence.
"We want peace, the government should fall but we want that in a peaceful way. I call on all those who are in the streets to pull back," Hariri said told the Future Television channel.