Drug runners may be targeting Nigerian women as "mules" after a UK government clampdown in Jamaica, warn campaigners.

The number of Nigerian women on drugs charges in UK jails has risen almost sixfold in three years, figures supplied to the BBC News website show.
On 30 June this year 85 of the 151 Nigerian women in custody in the UK were being held for drugs offences. In 2002 there were just 15 out of 29.