Lebanon's army has detained more than 100 Syrians for entering the country illegally following a series of suicide bombings in a border village.
The raids took place at informal refugee camps in the Baalbek region.
On Monday, at least eight bombers blew themselves up in the predominantly Christian village of Qaa, killing five people and injuring almost 30 others.
No group has said it was behind the attacks, but suspicion has fallen on jihadist militants from Islamic State.
IS has carried out previous suicide bombings that have killed scores of people in Lebanon.
'Security challenges'
Lebanon's official National News Agency (NNA) cited an army statement as saying that troops had raided Syrian refugee encampments on Tuesday and arrested 103 Syrians "for not having legal papers". Nine motorbikes were also confiscated.
Troops also searched the Qaa Projects (Masharia Qaa) camp for "wanted individuals", according to an NNA reporter in the area.
Masharia Qaa is located outside the village of Qaa, where the mayor advised residents to stay indoors after Monday's unprecedented attacks.
In the first wave of attacks, four suicide bombers blew themselves up one after the other at dawn outside a house in Qaa.
Five people were killed and another 15 wounded, including four soldiers who went to investigate the first blast.
It was not immediately clear who or what the attackers planned to target, but the house was about 150m (490ft) from a Lebanese customs border point on the road linking the Bekaa valley to the Syrian town of Qusair.
