Apparent vote-rigging in Zimbabwe

LONDON, England (CNN) - Video secretly recorded by a Zimbabwean prison guard appears to show evidence of vote-rigging in the country's recent presidential runoff election.

The footage, shot with a secret camera provided by the British newspaper The Guardian, was posted on the paper's Web site Saturday. The paper said the guard had since fled the country with his family.

The video shows the guard being summoned along with other prison guards to an office at Harare's central jail days before the June 27 runoff between President Robert Mugabe and opposition leader Morgan Tsvangirai.