Five suicide bombers attacked Lebanese soldiers as they raided two Syrian refugee camps in the Arsal area at the border with Syria on Friday and a sixth militant threw a hand grenade at a patrol, the army said.
The army said seven soldiers were wounded and a girl was killed after one of the suicide bombers blew himself up in the midst of a family of refugees. It did not elaborate.
The raids were part of a major security sweep by the army in an area that has been a flashpoint for violent spillover from the Syria crisis, and several Islamic State officials were among some 350 people detained, a security source said.
A Lebanese army statement said one suicide bomber had detonated his explosive laden belt in front of an army patrol during a manhunt for suspected militants in a refugee camp in the northeastern border town. Three soldiers were wounded.
The army said four other suicide bombers blew themselves up without causing any injuries among soldiers, while another militant threw a grenade at a patrol, wounding four soldiers.
During the raids an explosive device blew up while four other explosive devices that were being prepared by the militants were defused.
The Lebanese army has in recent months stepped up raids in the makeshift camps built on the edge of Arsal, where refugees live in squalid conditions.
The manhunt inside the sprawling camps on the border area came after intelligence reports that militants were preparing to stage a series of attacks inside Lebanon.