Egyptian President Mohamed Mursi has signed into law a new Islamist-drafted constitution after it was approved by 63.8 percent of voters in a referendum.
Egypt's cabinet has denied reports that central bank governor Farouk El-Okadah has resigned from his post.
State TV claimed the popular governor had stepped down from his post and was set to be replaced by his deputy Hisham Ramez.
Egypt's state television reports that the country's central bank governor Farouk El-Okadah has resigned, with his deputy Hisham Ramez the most likely candidate to take his place.
Both the former governor and his deputy helped steer the central bank during last year's uprising that ousted former President Hosni Mubarak and worked to keep the Egyptian currency relatively stable despite the political turmoil.
Egypt's central bank governor Farouk El-Okadah has resigned from his post, the news agency Reuters reports.
Egypt's vice president, Mahmoud Mekki, has resigned from his post, a presidential source told Reuters, without giving any reason.
The presidential spokesman is due to issue a statement shortly, the source said.
Mekky took a leading role in hosting "national unity" talks called by President Mohamed Mursi, although the main opposition politicians stayed away.
Unofficial tallies of Egypt's referendum on its constitution are likely to emerge within hours of polls closing at 7pm local time (5pm GMT).
However, the referendum committee may not declare an official result for the two rounds until Monday, after hearing appeals.
Egyptians are voting in the second and final phase of a referendum on an Islamist-backed constitution that has divided their nation.
Security personnel have been deployed at polling stations across the country to help keep order during the referendum.
The vote has opened in 17 of Egypt's 27 provinces with about 25 million eligible voters.
Polling stations have opened in Egypt in the second and final round of a referendum on a new constitution. It was drafted by an assembly which the opposition says is polarising the nation.
After a first round vote last week which unofficial results showed as 57 per cent approval of the constitution, polls opened again at 8am local time (6am GMT).
Polls are scheduled to close at 7pm (5pm GMT) but could be kept open longer as they were last week.
The opposition said voting in the first round was littered with abuses. Officials overseeing the poll have said there was no major irregularities.