President Paul Kagame's fierce critic Diane Rwigara is missing

Mystery surrounds the whereabouts of the Rwandan opposition politician, Diane Rwigara, who has been missing for 48 hours.She attempted to run for president in last month's elections against President Paul Kagame but was disqualified.Her family say she was arrested by the police, however the authorities have denied that she is in their custody.Police officers allegedly took Diane Rwigara and some of her family members to an unknown location on Tuesday night after raiding her house in the Rwandan capital Kigali, her brother Aristide said.Friends of Rwigara say police wanted to interrogate her over allegations of tax evasion and forgery.Rwigara declared her candidacy against Kagame, saying he had the worst human rights record on the continent.The electoral commission dismissed half of the supporting signatures she presented and disqualified her.Nude photographs purporting to be Rwigara appeared online soon after she declared her candidacy.She was later disqualified on a technicality from running against Kagame, who went on to win his third seven-year term with 99 percent of the vote.Rwigara vowed to continue fighting what she calls Kagame’s repressive government.Richard Tusabe, the authority's commissioner general, said the Rwigara family's tobacco company had not paid taxes "over a period of five years".Kagame has won international praise for presiding over a peaceful and rapid economic recovery in Rwanda since the 1994 genocide, when an estimated 800,000 people Tutsis and moderate Hutus were killed.