The primary suspect in the Helsinki explosion is one of the victims -- a 19 year old student who might have learned how to assemble home-made bombs by conducting the necessary research on the Internet.
"The youth was an avid user of online chat rooms, especially a Finnish one focused on explosives and bomb building which has now been shut down by authorities", Reuters reports.
Authorities are now probing the youth's surfing habits to determine if, in fact, he'd acquired the information from the web.