(Reuters) - Israel's military said it had killed three Hezbollah commanders and some 70 fighters in southern Lebanon in the past 48 hours, a day after confirming it had killed Hashem Safieddine, the militant group's heir apparent leader.

Israel expanded its evacuation warnings to several central neighborhoods in the southern Lebanese port city of Tyre on Wednesday, ordering people to evacuate north out of the city.

Israel has been carrying out an escalating offensive in Lebanon after a year of border clashes with Hezbollah, the most formidably armed of Iran's proxy forces across the Middle East.

Israel's offensive has driven at least 1.2 million Lebanese from their homes and killed 2,530 people, including at least 63 over the past 24 hours, the Lebanese government said on Tuesday.