Uganda’s opposition leader, Robert Kyagulanyi, popularly known as Bobi Wine has filed a legal challenge in the country’s supreme court to overturn the victory alloted to President Yoweri Museveni.

His party’s lawyer said Mr. Kyagulanyi was seeking cancellation of the results of the January presidential election that handed victory to the incumbent.

Mr. Museveni, a former guerrilla leader, who has led the East African country since 1986, was declared winner of the January 14 election, with 59 percent of the votes, while Mr. Kyagulanyi was given 35 percent.

“We want the poll cancelled and repeated,” said George Musisi, lawyer for Wine’s National Unity Platform (NUP).

Mr. Kyagulanyi, 38, a pop star and lawmaker, rejected the results and said he believed his victory was stolen.

Barrister Musisi said Mr. Kyagulanyi was asking the court to overturn the results on multiple grounds including widespread use of violence.

“There was outright ballot-stuffing, there was intimidation of NUP agents and supporters, some were arrested on the eve of the election, there was pre-ticking of ballots,” he said.

Mr. Kyagulanyi exploited his youthful energy and a widespread Ugandan love of music to build up a large followership among young people and present a formidable challenge to Mr. Museveni.