Palestinians planned a memorial service Thursday for journalist Shireen Abu Akleh who was killed while covering an Israeli raid in the West Bank, but have rejected US-led calls for a joint investigation into her death.

Palestinian-American Abu Akleh, 51, a veteran of Qatar-based Al Jazeera's Arabic TV service, was shot in the head during clashes in the Jenin refugee camp, a major flashpoint in the Israeli-Palestinian conflict.

Al Jazeera, Palestinian officials and witnesses said Abu Akleh was killed by Israeli forces, and the network insisted she was targeted "deliberately" and "in cold blood".

Israel has publicly called for a joint investigation into the killing and asked Palestinian authorities to hand over the bullet that struck Abu Akleh for forensic examination.