The Lebanese army has said it is prepared to use force to disarm gunmen and restore order across the country.It follows a week of clashes between supporters of the Western-backed government and the Hezbollah-led opposition.
At least 60 people are believed to have died in the violence.
There is a strong army presence in Beirut, the northern city of Tripoli and in the Chouf mountains south-east of the capital.
But correspondents say much of Beirut remains paralysed by street barricades, and the international airport is still closed.
The sectarian violence is the worst since the end of the 15-year civil war in 1990 and has led to fears of another all-out conflict.
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