Egypt has accused detained journalists from the Qatari-based Al-Jazeera television network of belonging to a "terrorist" group, saying they had ties with the blacklisted Muslim Brotherhood, the prosecution said Tuesday.

"The prosecution accused the suspects of belonging to a terrorist group," the prosecution said. It was not immediately clear if all of the detained journalists, including Australian Peter Greste, faced the same accusation.

One of the lawyers for Mohamed Adel Fahmy, the Canadian-Egyptian bureau chief for Jazeera English in Cairo, said his client had been accused of membership in the Brotherhood, which the military-installed government designated a "terrorist" group last week.

Police had arrested the journalists on Sunday, and the prosecution ordered them detained on Tuesday for two weeks to undergo questioning.

The government has cracked down on deposed president Mohamed Morsi's Brotherhood movement since his overthrow in July.

The crackdown has extended to media perceived as biased in favour of the Islamists.