At least six people have been killed and 32 others injured by gunfire in the Lebanese capital, Beirut.
It began during a protest by the Shia Muslim groups Hezbollah and Amal against the judge investigating last year’s huge blast at the city’s port.
They said Christian snipers from the Lebanese Forces (LF) faction fired at the crowd to drag Lebanon into strife – a claim denied by the LF.
Huge tension surrounds the probe into the port explosion that killed 219.
In response to Thursday’s shooting, Prime Minister Najib Mikati announced a day of mourning on Friday.
Meanwhile, President Michel Aoun said: “We will not allow anyone to take the country hostage to their own interests.”