In 2002, the Hofstad group was discovered by the Dutch General Intelligence and Security Service (AIVD). The intelligence gathered in the first years after the group was discovered was limited, revealing that the group had only been meeting together. These were informal living-room meetings held by a
Syrian asylum-seeker. By the end of 2002, the AIVD began to suspect that the organization was developing extremist views and discussing mass casualty events. On 14 October 2003, Samir Azzouz, Ismail Akhnikh,
Jason Walters and Redouan al-Issar were put under arrest for planning a (according to the AIVD) "terrorist attack in the Netherlands", but were released soon after. Azzouz was eventually tried in this case, but acquitted for lack of evidence in 2005: he did possess what he thought to be a home-made bomb, but having used the wrong type of
fertilizer, the device would never have exploded. At the beginning of 2003, a Hofstad member and his friend tried to join an Islamic rebel group in
Chechnya, but were discovered by authorities and arrested. During the summer, two Hofstad group members traveled to
Pakistan where they received paramilitary training. In September, the two men returned and it was discovered by authorities that these same men could be traced to having talked to a man having ties to the Casablanca bombings earlier that year. On 14 October of that year, the Spanish authorities arrested a Moroccan man who was suspected to be involved in suspicious activity. Police in the Netherlands arrested five Hofstad associates, including three who had traveled abroad and were in contact with extremists in Morocco and Syria. In 2003,
Mohammed Bouyeri, the man who murdered Dutch filmmaker
Theo van Gogh, was radicalized. He withdrew from mainstream Dutch society by quitting his job and distancing himself from all friends and family who were non-religious. This was the catalyst for the group's radicalization and Bouyeri's justification to kill Van Gogh for the blasphemy of Islam. == Claimed attacks ==