Silvia Fernández de Gurmendi met Museveni at the end of her visit to Uganda.
Opposition fears that Muhoozi Kainerugaba's positioning for top seat could spark violence in Uganda.
Mumbere was charged with murder in the Rwenzori region.
Basic rights are consistently violated and security forces continue to use 'excessive force and torture'.
Shutdown follows intense clashes between police and students, who were protesting a lecturers' strike.
After Burundi and South Africa, Gambia is latest to leave the ICC which investigates war and genocide crimes
MP Betty Nambooze is behind a controversial bill to control the mainly illegal supply and consumption of alcohol.
"Time is now of the essence. It's becoming our worst enemy. We don't have much time left," says ex-finance minister.
Police claims Besigye was arrested as a 'preventive measure' - his supporters say he was 'brutally abducted'.
Talks to end Burundi crisis which has rocked the country for around 18 months have stalled.
25 women protesting peacefully against proposed amendments to Uganda's Constitution detained Tuesday
Leader has 'three year plan' to illegally stay in power and 'install dictatorship'.
Uganda, after sending troops to support government, said arms embargo would weaken army after latest violence.
FDC leader asked for a speedy trial of his much-delayed treason case.
Commemorative event marking death of Netanyahu's brother overshadowed by 'gaffe'.
Dr Besigye, a long-time rival of President Museveni, has been repeatedly beaten, hospitalised and jailed.
EXCLUSIVE: FDC urges for sanctions, embargo over 'trumped-up' charges imposed on leader Kizza Besigye.
Besigye was arrested after mock swearing-in ceremony in which he declared himself Uganda's president.
Omar al-Bashir is wanted by the International Criminal Court on charges of genocide in Darfur.
Annan encouraged leaders to step down to stop contributing to conflicts on the continent.
FDC candidate Besigye has been arrested six times in ten days and is currently under house arrest.
Museveni wins 60.8% of the vote while rival Kizza Besigye claims 35.4% of the vote.
