Clashes in Egypt: Voting begins on referendum second stage

Egyptians have begun voting in the second stage of a constitutional referendum that has sparked weeks of unrest.

Some 250,000 security personnel have been deployed nationwide to try to keep order during the referendum.

These pictures show the latest clashes on Friday between supporters and opponents of President Morsi outside one of Alexandria's main mosques.

There was similar violence before the first round of voting last weekend.