US officials say the bullet that killed Shireen Abu Akleh was damaged and its origin can't be known.

Israeli gunfire likely killed reporter: US

Al-Jazeera journalist Shireen Abu Akleh was likely killed by unintentional gunfire from Israeli positions but independent investigators could not reach a definitive conclusion about the origin of the bullet that struck her, the US State Department says.

Abu Akleh was killed on May 11 during an Israeli raid in the town of Jenin in the occupied West Bank.

The US Security Coordinator (USSC), after summarising investigations by both the Israel Defence Forces (IDF) and Palestinian Authority, concluded that gunfire from Israeli positions was likely responsible for Abu Akleh’s death, the US State Department said.

“The USSC found no reason to believe that this was intentional but rather the result of tragic circumstances during an IDF-led military operation against factions of Palestinian Islamic Jihad,” the State Department said in a statement.

In forensic analysis by third-party examiners overseen by the USSC, however, ballistic experts determined the bullet was badly damaged, which prevented a clear conclusion as to its origin, the State Department said.

Palestinians have said the Israeli military deliberately killed Abu Akleh.

Israel has denied this, saying she may have been hit by errant army fire or by a bullet from one of the Palestinian gunmen who were clashing with its forces at the scene.

Read the article in The Canberra Times (AAP).