Police fire tear gas at protesters near Tahrir Square in Cairo this morning
1530 GMT: The head of the Constituent Assembly, Hossam el-Gheriyani, has said the final draft of a Constitution will be finished on Wednesday, and three other members said the document will be put to a vote on Thursday.
Mahmoud Ghozlan, the Brotherhood's spokesman, said, "We have called for pro-Mursi nationwide protests. The exact locations of the protests are currently being discussed."
Salah Abdel Maboud, a leading member of the Salafi Nour Party, confirmed that Islamists would stage protests on Saturday, including a possible gathering in Cairo's Tahrir Square.