Heavier security measures, including more checkpoints, were in evidence on Friday around the stronghold of the Shiite movement Hezbollah in Beirut’s southern suburbs, following a deadly bomb blast a day earlier.
Lebanese government troops were conducting searches and checking identity cards as vehicles entered the area.
Hezbollah militants were also on high alert, checking cars in streets where most of the organisation’s leaders live.
Thursday’s bombing in the Haret Hreik district, which left at least six people dead and more than 60 wounded, has raised further fears of a sharply divided Lebanon being dragged into the conflict in neighbouring Syria.