The Israeli military says three more soldiers were killed during fighting and four others were seriously injured in various battles in northern Gaza, Al Jazeera reports.

The dead were identified as a 23-year-old officer and two soldiers, 20 and 21 years old, in the Israeli military’s 188th Armoured Brigade’s 53rd Battalion.

More than 80 Israeli soldiers have been killed in Gaza since the start of the ground invasion of the Palestinian enclave, the UN said, citing official Israeli sources. It was not known if the latest deaths announced by Israel were part of that total.