Uganda's main opposition leader is urging his supporters to protest his continued detention at home following the country's disputed presidential election.

Kizza Besigye said Sunday that "the only way to get out of this is to use the popular numbers that we have to make sure that the gunmen do not do what they are doing."

Long-time Ugandan President Yoweri Museveni was on Saturday declared the winner of presidential polls held on Thursday, but Besigye's party has rejected the official results, alleging massive vote rigging.

Besigye, who is still detained in his house on the outskirts of the capital, said he plans to visit the headquarters of Uganda's election commission to demand detailed copies of results from across the country.