Burundi has beet hit by new protests as opposition supporters clashed with police for the third day on Tuesday.
The protestors are angered by the nomination of the president by his party to run for a third term in the forthcoming elections.
The army and police have been dispersing demonstrators using tear gas and water cannon while some sources say that gun fire has also been heard.
The protests first broke out at the weekend after President Pierre Nkurunziza announced his bid for a third term in office.
The opposition protesters say the move is unconstitutional, since the president has already held two terms in officer.
His supporters say his first term does not count as he was picked by parliament, not elected.
The UN Office for the Coordination of Humanitarian Affairs says there has been widespread intimidation and efforts to shut down media outlets in the country.
More than 20,000 Burundians have sought refuge in neighboring Rwanda over the past two weeks. The UN says it is working with the Rwandan government to relocate them to new camps.
Thousand of Burundians have also sought refuge in the Democratic Republic of Congo and around one hundred in Tanzania.
The protests are the biggest in Burundi since the civil war ended in 2005.
UN chief Ban Ki-moon has sent his special envoy for the region, Said Djinnit, to Burundi for talks with Mr Nkurunziza.
