Between May 24 and June 3, Moroccan authorities briefly detained between 300 and 400 members and leaders of the Islamist Justice and Charity group (Al Adl wal Ihsan), which is believed to be the largest (non-party) opposition group in Morocco. Mass arrests in several cities, quickly followed by releases, were made after the group launched an "open doors" campaign to recruit outside traditional areas such as mosques and universities. Group officials denied they have told their followers to prepare for an uprising this year, as reported in some Moroccan newspapers.