The assembly writing Egypt's constitution said it could wrap up a final draft later on Wednesday, a move the Muslim Brotherhood sees as a way out of a crisis over a decree by President Mohamed Mursi that protesters say gives him dictatorial powers.

But as Mursi's opponents staged a sixth day of protests in Tahrir Square, critics said the Islamist-dominated assembly's bid to finish the constitution quickly could make matters worse.

Two people have been killed and hundreds injured in countrywide protest set off by Mursi's decree.