A powerful explosion killed seven people at a busy shopping centre on the outskirts of the capital Helsinki. The blast ripped through the mall at about 1930 (1630 GMT) on Friday, killing six people and causing up to 80 injuries. Thousands of people were shopping there at the time. A seventh person died on Saturday in hospital, and about a dozen others underwent emergency surgery. Prime Minister Paavo Lipponen said the blast at the three-storey Myyrmanni Shopping Mall in Vantaa was "an act of terror". It was too early to tell whether a group or an individual was responsible, he added.