Egypt's Vice President Mahmoud Mekki has resigned, according to a state TV station.

Mr Mekki's resignation was announced with more than five hours to go of voting in the second and final phase of a referendum on a disputed, Islamist-backed constitution.

Mr Mekki, a career judge, has said he intends to quit once the charter is adopted. The new constitution eliminates the post of vice president.

However, a statement by Mr Mekki read on state TV hinted that the motive of his hurried departure could be linked to the policies of Islamist President Mohammed Morsi.

He said he first submitted his resignation last month but events forced him to stay on.

"I have realised a while ago that the nature of politics don't suit my professional genesis as a judge," he wrote.

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