Afghan elections: The former warlord who would be vice-president

The Taliban has claimed responsibility for a deadly explosion on the last day of campaigning, ahead of Saturday's crucial presidential elections in Afghanistan.

Officials say at least six policemen were killed when a suicide bomber blew himself up outside the interior ministry building.

General Abdul Rashid Dostum, the former Afghan warlord blamed for some of the worse atrocities in his country, has told the BBC that he hopes for a "lawful transfer or power".

Karen Allen reports.