Ugandans vote in presidential, parliamentary and local elections on 18 February, in the third polls since the restoration of multiparty politics in 2005. President Yoweri Museveni is seeking to extend his 30-year rule and, is vying against seven opposition candidates for a fifth term - he faces his toughest challenge yet. Candidates include his long-time rival Kizza Besigye and former prime minster Amama Mbabazi. From fights between government-funded "crime preventers" and opposition supporters to blasts of teargas and bullets at rallies, the campaign season has already been marred by violent incidents. Meanwhile Human Rights Watch says Uganda's human rights situation seriously undermines the prospect of free and fair elections and the ability of Ugandans to exercise fundamental human rights such as free expression, assembly, and association. Maria Burnett, senior researcher in the Africa Division of Human Rights Watch..