The Muslim Brotherhood has called for mass protests across Egypt to demonstrate against sweeping new powers taken by the ruling military council, BBC News reported.
Over the weekend, the generals issued two decrees dissolving the Islamist-dominated parliament and claiming all legislative power for themselves.
MPs are also expected to try to enter the parliament building on Tuesday, June 19.
Meanwhile, the Brotherhood has said the official results of the presidential election confirm its candidate has won.
A spokesman for the Islamist movement's Freedom and Justice Party (FJP) announced that its chairman, Mohammed Mursi, had received 13,238,298 votes, or 52%, compared with former Prime Minister Ahmed Shafiq, who he said had 12,351,184 votes, or 48%.
The Higher Presidential Election Commission (HPEC) is scheduled to announce the official results on Thursday, but it usually shares them with the candidates beforehand to give them a chance to make objections.
The results tally with what Egyptian media and independent observers have been reporting, and the FJP's own calculations, which it released on Monday.
Mr Shafiq has not yet conceded victory, but it will be a big surprise if Mr Mursi is not now declared the official winner.