Australian Prime Minister Anthony Albanese confirmed that 43-year-old Frankcom was among those killed and demanded full accountability from the Israeli Government.
Israel has proposed a multi-phase deal to Hamas through Qatari and Egyptian mediators, including a two-month pause in fighting and the release of all remaining hostages in Gaza.
Palestinian group Hamas, engaged in a war with Israel in the Gaza Strip, warned Sunday that no hostage would leave the territory alive unless the group's demands were met.
Israel has warned of a full-force resumption of war if no more hostages are freed. The Biden administration has cautioned against significant displacement and casualties among Palestinian civilians.
The death number in Gaza from the Israeli offensive since October 7 has risen to 14,854, with 5,850 children among the casualties, CNN reported, citing Hamas authorities in the Strip.