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 traveled abroad and were in contact with extremist in Morocco and Syria.