A senior United Nations official told the Security Council on Friday that the situation in Gaza "might deteriorate in the coming days" and called for civilians, particularly children, not be targeted.
"Israel must uphold its responsibilities under International Human Rights and Humanitarian Law. Lethal force should only be used as a last resort with any resulting fatalities properly investigated by the authorities," UN deputy political affairs chief Taye-Brook Zerihoun said.
It was just reported that at least 16 Palestinians are supposed to be killed and hundreds injured in an attempt by Israeli forces to confront one of the largest Palestinian demonstrations along the Israel-Gaza border in recent years.
United Nations Secretary-General Antonio Guterres called for an independent and transparent investigation into the deaths and injuries in Gaza on Friday, his spokesman said in a statement.
"He also appeals to those concerned to refrain from any act that could lead to further casualties and in particular any measures that could place civilians in harm's way," UN spokesman Farhan Haq said.
(With Inputs from Reuters)