A series of Israeli strikes have targeted Beirut’s southern suburbs, almost an hour after the Israeli army issued an evacuation order to residents of the area, in areas that it said held underground facilities used by Lebanese group Hezbollah for drone production.

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.