All members of an Irish Defence Forces battalion "are well and accounted for" after they came under "small arms fire" in south Lebanon.
The incident happened at about 18:30 Ireland time (20:30 Lebanon time) on Thursday.
A Defence Forces spokesperson said the 127 Infantry Battalion had been conducting a patrol.
The battalion is part of the United Nations Interim Force in Lebanon (Unifil) in the south of the country.
Unifil is a peacekeeping mission which was created in 1978 to monitor hostilities and help ensure humanitarian access to civilians.
The spokesperson added: "Defence Forces personnel initiated immediate action drills and their actions and force protection measures as well as the armoured capabilities of the vehicles they were conducting the patrol in ensured the safety of all troops."
They said they will "continue to enact the Unifil mandate by monitoring and reporting on the situation in southern Lebanon".
They condemned any attacks on peacekeepers.
Ireland currently has about 300 peacekeepers stationed at its military base in south Lebanon, known as Camp Shamrock.
In August it was confirmed that the United Nations peacekeeping operation in Lebanon is set to come to an end in 2027.
