Witnesses and local journalists in the Gaza Strip say they've seen Israeli tanks and armoured vehicles on the outskirts of the southern city of Khan Younis.
A surgeon at a hospital in the southern city has described a "chaotic" situation there, after heavy bombing over the past day.
The Israel Defense Forces (IDF) has continued to push southwards, saying it's expanding its ground operation to cover "all areas" of the Palestinian territory.
Using social media and leaflet drops, the IDF has given fresh evacuation orders in Gaza - amid warnings from aid groups that people are running out of places to flee.
An adviser to the Israeli PM has insisted there are "designated safer zones" for people to go to, after top US officials called on the IDF to ensure it protected civilians.
The Hamas attack on Israel on 7 October killed 1,200 people, with around 240 others taken hostage.
Since then, Gaza's Hamas-run health ministry says more than 15,800 people have been killed in Israel's retaliatory campaign, including about 6,000 children.
Meanwhile, a 32-year-old man has been killed and four people seriously injured in an Israeli military raid in the occupied West Bank, according to the Palestinian health ministry.
In an update earlier, the ministry said the man was shot and others injured by Israeli soldiers in Qalandia, which is between the West Bank city of Ramallah and Jerusalem.
The BBC has approached the Israeli military for comment.
According to the UN, 244 Palestinians, including 65 children, have been killed by Israeli troops or settlers in the West Bank and East Jerusalem since 7 October. Four Israelis, including three soldiers, have been killed in attacks by Palestinians in the West Bank, and another four in west Jerusalem.
The Palestinian health ministry in the West Bank is run by the Palestinian Authority, rather than Hamas - which runs government ministries in the Gaza Strip.
