The death of Shani Luk, a 23-year-old German-Israeli woman who was kidnapped by Hamas on Oct. 7, was confirmed by both the Israeli Foreign Ministry and the German government on Monday.

German Chancellor Olaf Scholz wrote on social media, "The news of Shani Louk's death is terrible."

"This shows the full barbarity behind the Hamas attack - who must be held accountable." Scholz said. "This is terror, and Israel has the right to defend itself."

Hamas has released a new video that claims to show three female hostages. One of the hostages speaks in Hebrew pleading for their release, blaming Israeli Prime Minister Benjamin Netanyahu for Hamas' Oct. 7 attack and calling on Netanyahu to help free the hostages.

The group that represents the hostage families confirms the names of the three women in the video as Rimon Buchshtab Kirsht, 36; Danielle Aloni, 44; and Yelena (Lena) Trupanob, 50.

Netanyahu's office in a statement called the video "cruel psychological propaganda by Hamas-ISIS."

"We embrace the families and are doing everything to return all of the captives and missing to their families," Netanyahu's office said.

According to the Israeli military, 230 people were taken hostage by Hamas.

The Israel Defense Forces said four prominent Hamas operatives, including a commander of Hamas' naval forces, have been killed in the last few hours.

This comes after the IDF says it "expanded" its ground operations in Gaza overnight.

Israeli military tanks apparently reached the main highway of the Gaza Strip on Monday morning, pushing deep into the eastern part of the territory, according to statements from Hamas officials as well as reports from Palestinian journalists.

The Hamas government media office said in a statement that "a few" Israeli tanks targeted civilian cars on the outskirts of Gaza City during an incursion along Salah al-Din Road, which connects the north to the south. Israeli troops then used a bulldozer to cut the street before Hamas militants "forced them to retreat," according to the office.

"There is currently no presence of occupation army vehicles on Salah al-Din Road, and citizen movement has returned to normal on it," the office added.

Izzat Al-Rishq, a member of Hamas' political bureau, also released a statement about the alleged incident on Salah al-Din Road, saying an Israeli tank had "positioned itself for 15 minutes" on the highway and "bombed a civilian car that was returning from the south of the Gaza Strip to its north."

"The car, crowded with a civilian family, tried to return, but the tank bombarded it with a shell," Al-Rishq said in a statement. "The Al-Qassam and Resistance Brigades engaged in violent clashes with the tanks, which penetrated all the way to Salah al-Din Road and hit at least one tank directly. The tanks turned back and they realized that the area in front of them was a minefield."

Video filmed by a Palestinian journalist purportedly shows an Israeli tank striking a car that was attempting to turn around and drive away on Salah al-Din Road on the outskirts of Gaza City.

Israel Defense Forces spokesman Rear Adm. Daniel Hagari told reporters during a press briefing on Monday morning that he can't comment on the location and movement of troops in Gaza.

-ABC News' Nasser Atta, Bruno Nota and Morgan Winsor