Early results show Egypt's controversial new constitution has received a 'yes' majority in the second and final round of voting.

It's believed the charter will receive around 60 per cent of votes - with turnout at just over 30 per cent.

The constitution, which is backed by President Mohammed Morsi and the Muslim Brotherhood, has been the focus of unrest in recent weeks.

The opposition National Salvation Front says the constitution will damage human rights, the rights of women and harm religious freedoms.