RABAT, Morocco — Little would seem to connect a soldier, a shopkeeper, airline pilots' wives and a woman known for helping people in need. But all have been named as suspects in a purported Islamic terrorist plot, suggesting extremism may be leaping Morocco's class divides.

In all, Moroccan authorities arrested 56 people last month for allegedly being part of a network that was planning attacks on military and tourist sites in hopes of bringing down the government of this North African monarchy.

Since the Sept. 11 attacks in the United States and suicide bombings two years later that killed 33 people in Casablanca, this country's economic capital, Moroccans have grown accustomed to police crackdowns on Islamic militants.

Thousands have been detained, drawing frequent accusations of abuse and forced confessions at the hands of police.

What's new in the latest case is the wide range of people accused. Middle-class women and security force members allegedly formed the core of a group that authorities say called itself Ansar al-Mehdi, or Supporters of the Mehdi — a divine figure in Islamic tradition who will establish justice on Earth before Judgment Day.

Previously, Islamic extremism was most evident in Morocco's urban slums like Sidi Moumen, the cinderblock jungle in Casablanca where many of the 2003 suicide bombers lived. If the charges are true, the new case would suggest Muslim militancy is spreading into the middle class.

Penetration of the army would be a particular blow because the Western-equipped force has traditionally stood as a pillar of state power. After the sweep, King Mohammed VI fired the head of military intelligence and the head of Morocco's general security forces.

Morocco ended compulsory military service this month, but officials said it had nothing to do with the Ansar al-Mehdi revelations.

Officials have released little information about the Mehdi suspects and their alleged targets, divulging just a few names. The Justice Ministry says judges are preparing for public hearings originally planned for mid-September but now delayed until late October.

Two of the four female suspects are wives of Royal Air Maroc pilots, and Interior Minister Chakib Benmoussa alleged they were recruited by alleged Ansar al-Mehdi chief Hassan Khattab to carry out suicide attacks in Morocco.

Khattab spent two years in jail for involvement in the May 2003 suicide bombings.