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. Last Updated: 07/27/2016

Sweden Bomb Threats

STOCKHOLM, Sweden () -- Sweden's national news agency TT received a letter Monday claiming an extremist group opposed to Stockholm's bid for the 2004 Olympic Games was behind last week's bomb blast at the city's Olympic stadium.

The letter, purportedly from a group calling itself "We who built Sweden,'' also warned of further attacks unless Stockholm withdraws its bid for the games.

"We are the ones who burn and blow up sports arenas,'' the message said. "We have large reserves of explosives, automatic weapons and ammunition. Do not doubt our determination and ability.''

Swedish police said the note probably was not written by those responsible for the blast -- the eighth attack against sports arenas in Stockholm since May.

"The contents suggest that someone else has written the letter, but it's hard to tell before the security service has analyzed it,'' Stockholm police spokesman Claes Cassel told TT.