Israeli forces withdrew to the yellow line in October as part of the ceasefire deal with Hamas. The partial withdrawal left Israeli forces in control of more than half of the strip.
The yellow line was intended as the first of three demarcation lines, to which Israeli forces would withdraw as the ceasefire progressed through its three stages.
The Israel Defense Forces said it launched a series of strikes in southern Lebanon on Thursday, targeting what it alleged were one Hezbollah member and several military facilities used by the group.
In a post to X, the IDF said it attacked a Hezbollah member in the Al-Tayyiba area of southern Lebanon.
In an earlier post, the IDF reported several strikes on what it called Hezbollah "infrastructure sites" elsewhere in the region.
Among the targets were an alleged Hezbollah military compound the IDF said was used for training and weapons storage. Several other "military structures" were also attacked, the IDF said.