Police in Uganda quell protest against planned law reform on presidential rule
Ugandan police fired tear gas to disperse protesters opposed to plans to introduce legislation that could allow the long-time president to extend his rule.
The bill is likely to be introduced in the national assembly despite growing opposition from religious leaders, civic groups and opposition leaders.
Ugandan police had warned that no protests, in support of or against the president, would be allowed.
But some opposition figures have vowed to mobilise mass support against a bill they believe is intended to enable President Yoweri Museveni to remain in power for the rest of his life despite having already ruled the East African country for more than three decades.
Uganda's constitution bars anyone over the age of 75 from seeking the presidency.
Mr Museveni, 73, is ineligible to run again in 2021 if the age restriction remains.
His critics accuse him of using the security forces to harass the opposition, but Mr Museveni's supporters say he enjoys wide support across the country.
On Thursday, amid heavy police and military deployment across the normally calm capital, Kampala, police fired tear gas at Makerere University students who were planning to stage a walk to the precincts of parliament.
Ugandan police also besieged the offices of two NGOs that authorities accuse of supporting anti-government protests.
ActionAid and the Great Lakes Institute for Strategic Studies are suspected of "receiving funding" from unnamed sources to incite protests against the government, said police spokesman Asan Kasingye.
Police are searching the offices of the NGOs for incriminating evidence, he said Thursday.
It was not immediately possible to get a comment from the NGOs.
In a statement on Thursday, Deborah Malac, the US ambassador to Uganda, urged Uganda's government to protect basic freedoms "without fear of intimidation".
"The United States is deeply concerned that recent arrests and raids stifle the Ugandan people's right to free expression and tarnish Uganda's global image," Ms Malac said in the statement.
"We are disturbed by reports of raids on NGOs."
Mr Museveni's party has an overwhelming majority in the national assembly, so the legislation to remove the age limit is expected to pass when the procedural process starts.
Mr Museveni, a US ally on regional security over the years, took power by force 1986 following a bush war.
He won re-election last year in a poll marred by allegations of vote fraud and intimidation by the security forces.
Although Mr Museveni has warned in the past that Africa's problem was leaders "who want to overstay in power", he has since said he was speaking about leaders who are not elected.