The army was deployed to end fighting in Tripoli earlier this month
A suspected suicide bomber has been shot dead by troops near Lebanon's largest Palestinian refugee camp.
The man, carrying a grenade and thought to be wearing an explosive belt, had approached an army checkpoint just outside the southern city of Sidon.
Troops at the position outside the Ain el-Hilweh camp opened fire and killed the man instantly, the army said.
The incident came hours after an explosion killed a soldier near a refugee camp in the country's north.
The explosion occurred at an army intelligence post near the Nahr El-Barad refugee camp outside Tripoli.
The camp saw three months of bloody street battles last year between Islamic militants and the Lebanese army, in fighting that killed hundreds of people before troops brought the situation under control.
Saturday's violence came as politicians in Beirut resumed talks on the formation of a new government, after a peace deal earlier this month.
That deal brought the election of a president, and a swift end to 18 months of political crisis.
But most of the cabinet jobs in a new government of national unity have yet to be allocated.
Under the deal, the Western-backed parliamentary majority will have more than half of the seats in the new cabinet, under Prime Minister-designate Fouad Siniora.
But the Shia militant group Hezbollah and other allies of Syria and Iran will have the power of veto over key decisions.