A former prison guard has smuggled a film out of Zimbabwe that allegedly shows how President Robert Mugabe rigged the June 27 runoff election.

The film shows officials with the ZANU-PF party forcing officers at Harare central jail to cast their ballots for Mr. Mugabe.  It also shows a prominent opposition leader, Tendai Biti, in leg irons.

Shepherd Yuda says he made the film for Guardian Films after his uncle, an opposition activist, was killed by supporters of Mr. Mugabe two months ago. 

The 36-year-old Yuda has since fled Zimbabwe with his wife and children.

Zimbabwean President Robert Mugabe addresses his supporters at Harare Airport, 04 Jul 2008

Meanwhile, The Washington Post reports Saturday that Mr. Mugabe initially planned to give up power after losing the first round of the election. 

The Post, citing sources at a key meeting, says military officials convinced Mr. Mugabe to remain in power by using the army to rig a runoff election.

To this point, African countries have largely avoided strong criticism of the runoff, which many observers and Western countries dismissed as a sham.

However, Nigeria on Friday criticized Zimbabwe's presidential runoff poll.  Speaking in Abuja, Nigerian Foreign Minister Ojo Maduekwe said Nigeria feels "strong displeasure" at the process leading up to the June 27 election and its outcome. 

Mr. Mugabe has said opponents must accept him as president if they want talks on ending Zimbabwe's political crisis.

Opposition leader Morgan Tsvangirai withdrew from the runoff because of the violence.  He told VOA Studio 7 Zimbabwe this week that he will not enter any talks with the government unless the violence stops.

His MDC party says 103 of its supporters have been killed in election-related violence, and that some 5,000 others are missing.