Zimbabwe state media say the country's ruling and opposition parties have each filed court petitions challenging some of the parliamentary results from last month's general elections.
The Herald newspaper says that President Mugabe's ZANU-PF party is challenging the results of 53 of the 210 seats, claiming that the opposition Movement for Democratic Change (MDC) bribed election officials.
The report says the MDC is disputing the outcome of 52 seats, alleging that the ruling party bought votes and interfered with the voting process.
It says Zimbabwe's chief justice has appointed 17 more electoral judges to handle the volume of petitions, which must be decided within six months.
In March, Mr. Mugabe's party lost its majority in parliament for the first time in 28 years. The election commission says a runoff is needed to determine the winner of the presidential vote.
The opposition party says its leader, Morgan Tsvangirai, won outright against President Mugabe. Zimbabwe's election commission said Mr. Tsvangirai won more votes but not enough to avoid a runoff.
Election officials say they will meet soon to set a date for a second presidential election.
Meanwhile, African Union leaders are meeting to discuss the political crisis stemming from the March presidential election.
Some information for this report was provided by AFP.