By Euan Rocha TORONTO (Reuters) - BlackBerry shares rose more than 3 percent on Monday after a news website said Chinese computer maker Lenovo Group might offer to buy the Canadian technology company. Benzinga.com, citing an unnamed source familiar with the matter, said an offer worth $15 a share could come as early as this week. Lenovo and BlackBerry said their companies did not comment on rumors and speculation. Rumors of a Lenovo bid for BlackBerry have swirled many times over the last two years. ...



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