The Israeli military carried out strikes on Hezbollah “drone factories” in southern Lebanon and suburbs of Beirut on Thursday, as large plumes of smoke could be seen rising from the Lebanese capital.

The airstrikes on the southern outskirts of the Lebanese capital, an area where Hezbollah holds sway, were some of the heaviest since a U.S.-brokered cease-fire came into effect in November.

Israel has continued to carry out near-daily strikes in southern and eastern Lebanon since then, which Lebanon has said are in violation of the ceasefire deal. Israeli officials say the strikes are intended to prevent Hezbollah from regrouping after a war that took out much of its senior leadership and arsenal.