More than 70 people have been arrested during a day of sporadic protests in pockets of the Ugandan capital, Kampala, according to a spokesperson for the city's police.

Demonstrators have burned tyres, thrown stones and erected roadblocks, the BBC's Catherine Byarunhanga reports, while soldiers and police officers were seen speeding through the city centre in pick-up trucks.

They are angered by reports that opposition MP Robert Kyagulanyi - aka Bobi Wine - has been tortured while in custody, a claim that President Yoweri Museveni denies.

In parts of Kampala, security officers shot rounds of live bullets into the air and fired tear gas to disperse crowds.

The East African Law society has condemned what it calls "increased systemic violence targeting persons perceived to be political dissidents to the ruling party as well as members of public seen to be openly sympathetic to their cause".

In a statement the group adds that it is "monitoring the situation in the Republic of Uganda and collecting crucial evidence that will enable us to ensure justice to every player".