A mural in Bethlehem, in the occupied West Bank, depicts slain Al Jazeera journalist Shireen Abu Akleh

The family of prominent Palestinian-American journalist Shireen Abu Akleh, shot dead in the occupied West Bank, asked US President Joe Biden on Friday to meet during his visit next week.

Their request came after they condemned a US probe which said it was not possible to determine whose gun fired the bullet which killed the Al Jazeera News Today Jazeera reporter.

A US citizen, she was shot in the head while covering an Israeli army operation in Jenin on May 11, despite wearing a vest that said "Press."

In a letter sent to Biden Friday morning, the journalist's brother Anton Abu Akleh said she was "murdered by an Israeli-fired bullet."

The family called on Biden to "meet with us during your upcoming visit and hear directly from us about our concerns and demands for justice".

Biden is to visit Israel and the occupied West Bank from July 13 to 15, and plans to hold talks with leaders on both sides before heading to Saudi Arabia in his first trip to the region since being elected president.