Egypt's largest opposition group, the Muslim Brotherhood, says one of its senior figures and 14 others have been released from custody.
The Muslim Brotherhood is the leading opposition group in Egypt
No reason was given for the release of the group's secretary-general, Mahmoud Ezzat, and his fellow party members, who have been in custody since August.
The Muslim Brotherhood is officially banned in Egypt.
However, its supporters make up the largest opposition group in parliament and the group is generally tolerated.
It ran in the legislative elections in November and December 2005, with candidates standing as independents, and won 88 of the 454 seats in parliament.
According to the group, 40 of its members are still being held by the Egyptian authorities, including Essam al-Aryan and Mohammed Morsi of the Muslim Brotherhood's political bureau.