Zimbabwe's Robert Mugabe sworn in for another term . A tyrant!

Harare, Zimbabwe (CNN) -- Zimbabwean President Robert Mugabe was sworn in for another term Thursday following disputed elections.

The ceremony was delayed by opposition leader Morgan Tsvangirai's petition challenging the July 31 election. He withdrew the court case last week, paving the way for the swearing-in.

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The nation's electoral commission declared Mugabe the winner with 61% compared with the former prime minister's 34%.

Mugabe, 89, is Africa's oldest leader and has led the southern African nation since it got its independence from Britain. He led the newly-independent Zimbabwe, first as prime minister in 1980, then as president seven years later.

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Five years ago, his party lost to Tsvangirai, who did not get enough votes to avoid a runoff.

Opposition party supporters were beaten, tortured and killed, rights groups said, and Tsvangirai withdrew from the runoff in protest. The postelection violence left about 200 people dead and thousands injured.

Regional leaders dismissed that election as a sham and pressured the two to form a power-sharing agreement. Mugabe's main opponent became his prime minister, and the squabbles have continued.

The fragile power-sharing government ended with this year's elections.