At least one person was killed and eight others were injured in an Israeli airstrike near the southern Lebanese city of Nabatieh, according to the country's health ministry.
Israel's military said it targeted Hezbollah's infrastructure, including weapons and underground tunnels.
Israel also accused Hezbollah of regrouping and maintaining its infrastructure, violating a US-arranged ceasefire from November.
Hezbollah did not immediately respond to the strikes, which happened amid growing calls for the Lebanese state to disarm the militant group.
Hezbollah says it will keep its arms while Israel controls part of southern Lebanon and continues its strikes on the country.
Israel still controls five hilltop points on Lebanese territory following its ground invasion last year.
Lebanese Prime Minister Nawaf Salam met with officials in the northeastern city of Baalbek, which took a significant hit from the conflict that killed 4,000 people. Salam told reporters, "The government has not and will not spare any effort to expedite the Israeli withdrawal from Lebanese territory,".
Hezbollah claims it has largely disarmed south of the Litani River, but Israel accuses the group of attempting to regroup.
Lebanon’s state-run National News Agency reported that public institutions in the area were closed after the attacks, with families rushing to schools to collect their children.
Despite a ceasefire that took effect in November, Israeli strikes have continued. Israel has targeted southern Beirut three times following two rocket attacks from southern Lebanon, which the Hamas militants — who control the Gaza Strip — allegedly launched in March.
Under the 2006 ceasefire agreement, both Israel and Hezbollah were meant to withdraw from southern Lebanon below the Litani River, leaving it under the control of the Lebanese military and UN peacekeepers.
This arrangement was intended to eventually cover the rest of the country, aiming to disarm all non-state groups, including Hezbollah, and end Israel’s military presence.
