A "campaign of violence" in Zimbabwe has extinguished any hope of free and fair run-off presidential elections, Human Rights Watch has warned

In a new report, the New-York-based group says it has extensive evidence linking senior officials loyal to Robert Mugabe with violent incidents. The report says torture camps have been run by President Mugabe's governing Zanu-PF party and its allies. Opposition leader Morgan Tsvangirai faces Mr Mugabe in the 27 June 2008 vote. The Human Rights Watch report says violence against supporters of Mr Tsvangirai's Movement for Democratic Change (MDC) has worsened in the lead up to the run-off. "Zimbabweans can't vote freely if they fear their vote may get them killed," said Georgette Gagnon, Africa director at Human Rights Watch.