NEW : United States officials see `` no Hamburg dimension '' to possible plot . German Interior Ministry : There are no `` concrete indications '' of imminent attacks . A man captured in United States talks about a `` Mumbai-style '' attack in the Pakistan Taliban , an official says . CNN 's Pam Benson , Tim Lister and Jeanne Meserve contributed to this report . He attended the same mosque in U.S. as 9/11 hijacker Pam Benson .
NEW : United States officials see `` no Hamburg dimension '' to possible plot . German Interior Ministry : There are no `` concrete indications '' of imminent attacks . A man captured in United States talks about a `` Mumbai-style '' attack in the Pakistan Taliban , an official says . He attended the same mosque in U.S. as 9/11 hijacker Pam Benson .