Four people have been killed in protests in the Democratic Republic of Congo over claims that President Joseph Kabila is seeking to extend his 14-year rule by delaying next year’s elections.
Protests continued on Tuesday in the capital, Kinshasa, following Monday’s fatal clashes between opposition supporters and security forces.
Protesters say government plans for a census are a ploy to delay elections.
Mr Kabila is constitutionally barred from contesting the poll.
He took power in 2001 following the assassination of his father Laurent Kabila, who was president at the time, and has won two disputed elections since then.
Police fired shots in the air to disperse protesters in Kinshasa on Tuesday, Reuters news agency reports.
Students had burned tyres and barricaded the road leading to the University of Kinshasa, it quotes witnesses as saying.