Egyptians vote in referendum on constitution
15 December 2012 Last updated at 10:54 GMT
Egyptians are voting in a referendum on a draft constitution that has divided the country and sparked deadly unrest.
President Mohammed Morsi and his Muslim Brotherhood have campaigned heavily in favour of the constitution.
Opponents say it is poorly drafted and too Islamist.
The BBC's Jon Leyne has been assessing the mood across the nation.