The United Nations has said that an Indian staff member's death this week in Gaza was caused by an Israeli tank attack on his vehicle.

Col Waibhav Kale, a former Indian army officer, died on Monday after a UN vehicle was struck near the city of Rafah. Another staffer was injured.

Col Kale's death is the first of an international UN worker in Gaza since the start of the conflict.

The Israel Defense Forces (IDF) has said the incident is under review.

On Wednesday, UN Deputy Spokesperson Farhan Haq said the organisation had "no doubt" that shots from an Israeli tank hit the back of the car, which was clearly marked as a UN vehicle.