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  Nigeria police detain suspicious people April 28, 2011 near a polling station during a security operation to stave ballot box-snatching in Bauchi, the capital of Bauchi state, nothern Nigeria.Two Nigerian states hit hard by deadly riots after presidential elections went back to the polls for governor races Thursday amid a security lockdown and with scores still displaced. Soldiers accompanied electoral officials to polls in Kaduna and Bauchi states and the electoral commission scrambled to find some 2,000 workers to replace those who refused to show up because of fears of violence. Police and military personnel in armoured vehicles patrolled the streets of Kaduna city, the capital of the same state, and set up roadblocks to search cars. Police kept a close eye on Bauchi city, the capital of that state. AFP PHOTO / Tony KARUMBA (Photo credit should read TONY KARUMBA/AFP/Getty Images)
  Nigeria police detain suspicious people April 28, 2011 near a polling station during a security operation to stave ballot box-snatching in Bauchi, the capital of Bauchi state, nothern Nigeria.Two Nigerian states hit hard by deadly riots after presidential elections went back to the polls for governor races Thursday amid a security lockdown and with scores still displaced. Soldiers accompanied electoral officials to polls in Kaduna and Bauchi states and the electoral commission scrambled to find some 2,000 workers to replace those who refused to show up because of fears of violence. Police and military personnel in armoured vehicles patrolled the streets of Kaduna city, the capital of the same state, and set up roadblocks to search cars. Police kept a close eye on Bauchi city, the capital of that state. AFP PHOTO / Tony KARUMBA (Photo credit should read TONY KARUMBA/AFP/Getty Images)

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Workers abducted in northern Nigeria

A search begins in Nigeria after seven foreign workers were kidnapped in a deadly raid. Vladimir Duthiers reports

Workers abducted in northern Nigeria

A search begins in Nigeria after seven foreign workers were kidnapped in a deadly raid. Vladimir Duthiers reports