"The law on parties has not been respected, because the decision was not submitted to judicial approval," Abdelhamid Amine of the Moroccan Association of Human Rights said.
Police this week arrested more than 30 people, including the allegedly leader of an cell.
The detainees included several opposition politicians, including Islamists and a member of a far-left party.
Among those arrested was Mustapha Moatassim, president of the Islamist party al-Badil al-Hadari (Civilizational Alternative), the dissolution of which was announced by the prime minister's office on Wednesday.
Human rights associations and leftist parties criticized the government for linking politicians with "terrorists", calling for a fair trial and the release of six of the detainees.
Güncelleme Tarihi: 22 Şubat 2008, 12:05