The United Nations warned Monday that the result of Egypt's new deadly political turmoil will have a "significant impact" on the transformation of other countries in the Middle East.

"The world is watching Egypt and what Egypt does with its transition will have a significant impact on other transition countries in the region," said deputy UN spokesman Eduardo del Buey as the Egyptian military gave President Mohamed Morsi 48 hours to meet popular demands.

"A stable and secure Egypt is crucial for regional stability and security," said the spokesman for UN leader Ban Ki-moon.

The UN is closely following the new protests in which at least 16 people were killed on Sunday, del Buey added.

While stressing that the "vast majority" of the protests appeared peaceful, del Buey said "the reports of a number of deaths and injuries, of sexual assault against women demonstrators, as well as acts of destruction of property are to be strongly condemned."

"Peaceful dialogue and non-violence are the keys to restoring stability and moving Egypt's transition forward," said the spokesman.

Egyptian opposition parties have demanded an early presidential election and the military has given Morsi 48 hours to respond to "the demands of the people" or it would intervene.