Australia’s prime minister on Wednesday expressed his “anger” to Israeli counterpart Benjamin Netanyahu, calling for accountability after an Australian aid worker and six others were killed in an Israeli strike in Gaza, AFP reports.

Prime Minister Anthony Albanese said he spoke to Netanyahu by phone early Wednesday morning, telling him that “Australians were outraged” by the death of Australian national Lalzawmi “Zomi” Frankcom.

“I expressed Australia’s anger and concern at the death of Zomi Frankcom, an Australian aid worker working for World Central Kitchen, providing support for people who are suffering from tremendous deprivation,” Albanese told reporters.

Netanyahu later admitted that Israel’s military had “unintentionally” killed them in an air strike.

He said it was a “tragic case” that would be investigated “right to the end”, but stopped short of apologising for the deaths.

Albanese said there was a need for “accountability” and “transparency” as investigators started to unravel what happened.

“I made clear again that it is Australia’s view that humanitarian assistance must reach people in Gaza unimpeded and in large quantities.”