He studied architectural planning at the Technical University of Hamburg - Harburg The men were recruited by a Hamburg postal worker named Mohammed bin Nasser Belfas , fellow college students and the Tabligh group , which was hijacked into a recruiting group .
He studied architectural planning at the Technical University of Hamburg - Harburg . 
 The other men were recruited by a Hamburg postal worker named Mohammed bin Nasser Belfas , fellow college students and the Tabligh group , which was hijacked into a recruiting group .