Egypt's vice president resigns!

Egypt's Vice President, Mahmoud Mekky, has resigned from his post, a presidential source said on Saturday, without giving any reason. This came on the day of a referendum on a new constitution that leaves uncertain if his position would be maintained.

Egyptian vice president Mahmoud Mekki

Mekky took a leading role in hosting "national unity" talks called by President Mohamed Mursi, although the main opposition politicians stayed away.