Officials say that in early 2009 , group set off from Hamburg for tribal areas of Pakistan . CNN was unable to locate Mohammadi , who has no address in Hamburg . Police detained a group member before he left ; 2 others arrested after arriving in Pakistan . Comment: Border area group is linked to plot that prompted advisory for U.S. citizens traveling in Europe .
Officials say that in early 2009 , group set off from Hamburg for tribal areas of Pakistan . Police detained a group member before he left ; 2 others arrested after arriving in Pakistan . Comment: Border area group is linked to plot that prompted advisory for U.S. citizens traveling in Europe .