The runner-up in Congo's contested presidential vote, Martin Fayulu, files a fraud complaint with the constitutional court in Kinshasa.
As his supporters protest outside Saturday.
Fayulu says he won the December election by a landslide with more than 60 percent of the vote.
And that's what pre-election polls predicted too.
Instead, victory was handed to opposition leader Felix Tshisekedi and there are fears the dispute could spark bloodshed.
(SOUNDBITE) (French) MARTIN FAYULU SUPPORTER, STEPHEN THEODORE, SAYING: "We ask the whole DR (Democratic Republic of) Congo population to wake up and take matters into their own hands when the time comes for us to take responsibility for our country.
We are ready to give everything for this country, we are ready to win and to save this generation in this country.
This was supposed to be a peaceful democratic transition - the first in the six decades since Democratic Republic of Congo became independent.
Now many are asking if Tshisekedi struck a backroom deal with outgoing president Joseph Kabila.
Those suspicions were fuelled on Saturday when Kabila's coalition won a majority in parliamentary elections - which will preserve his influence after he's gone.
Tshisekedi's camp denies any such pact.
The court has eight days to rule on Fayulu's challenge.
But he says that, too, is stacked with Kabila's appointees, so he isn't holding his breath.