Israel escalated on Friday its attacks on suspected Hezbollah positions in southern Lebanon, launching a series of air and drone strikes that hit mountainous areas and an apartment building.

Shortly afterward, an apartment building in the nearby city of Nabatieh was struck, killing one woman, wounding 11 and knocking out the building’s top floor, according to Lebanon’s state news agency.

The Israeli air force launched intense airstrikes on mountains overlooking the southern Lebanese city of Nabatieh on Friday, news agency AP reported. Its military described the action has been taken to strike the underground assets of the militant Hezbollah group.