The Muslim Brotherhood confirmed the closure.
Egyptian police have closed the offices of the Freedom and Justice newspaper, published by the Freedom and Justice Party, the political wing of the Muslim Brotherhood, the group said on Wednesday.
The party, the largest in Egypt, was the party of the ouster Egyptian President, Mohammed Morsi, who was removed in a military coup.
The Brotherhood, which on Monday was banned by a court ruling, said police had seized the properties in the building in Cairo’s Manial district and sealed it with wax.
The Egyptian government has decided to postpone implementation of the court order banning all activities by the Brotherhood and any affiliated organisations.
This will be pending the completion of expected appeals.
The newspaper’s members of staff have reportedly been working from outside its offices for some time.
This was aimed at evading the crackdown against Islamist leaders and activists since the army’s overthrown of former President Mohamed Morsi on July 3.
Security officials confirmed that the offices had been shut down.