The Israeli military has said an American activist who was killed in the West Bank last week is likely to have been shot by Israeli forces.

Aysenur Ezgi Eygi, a 26-year-old from Seattle, was killed on Friday following a demonstration against Israeli settlements in the occupied West Bank, according to Jonathan Pollak, an Israeli protester who witnessed the shooting.

The military said in its inquiry “found that it is highly likely that she was hit indirectly and unintentionally by (Israeli army) fire which was not aimed at her, but aimed at the key instigator of the riot”.

CORRECTION Israel Palestinians American KilledActivist colleagues of Aysenur Ezgi Eygi hold posters with her name and photo during her funeral in the West Bank city of Nablus on Monday (Nasser Nasser/AP)

The White House had earlier said it was “deeply disturbed” by the death of Ms Eygi, who also held Turkish citizenship, and called on Israel to investigate what happened.

In his account to the Associated Press, Mr Pollak said the shooting happened about half an hour after apparent 'clashes' had subsided.

Ms Eygi, a volunteer with the activist group International Solidarity Movement, was attending a weekly demonstration against settlement expansion that has been held for years and has often brought Israeli crackdowns and stone-throwing by protesters.

The killing came amid a surge of violence in the West Bank where more than 690 Palestinians have been killed.