Presidential adviser Willy Nyamitwe said Wednesday that the postponement comes after opposition leaders and international community members repeatedly requested to delay the polls.

However, Nymaitwe did not say if Burundi plans to stick to the planned date of June 26 for presidential polls in which President Nkurunziza is set to seek a highly disputed and controversial third term, according to DPA news agency.

Protests erupted in Burundi after Nkurunziza announced his unconstitutional run for a third term in office and his heavy-handed suppression of protesters made situations worse, resulting in the deaths of at least twenty people throughout the country.

Anti-government protesters continue to demand that President Pierre Nkurunziza abandons his bid for a third term in power. Burundian police fired shots and teargas during clashes with protesters on Wednesday. A soldier was shot and killed during these clashes, according to Agence France-Presse.

International organizations like Amnesty expressed concerns over volatile situation in Sub Saharan state. 

"The latest developments have increased the risk to civilians in a country already facing escalating violence. Those in power in Burundi have the ultimate duty to ensure that no more lives are lost as the situation unfolds," said Muthoni Wanyeki, Amnesty International's Regional Director for East Africa, the Horn and the Great Lakes.

UNHCR - UN refugee agency - said over 105,000 Burundians have now fled the country on the south of Rwanda, with over 70,000 crossing to neighbouring Tanzania, and over 9,000 to DR Congo.

World Health Organization (WHO) also warns that a severe humanitarian crisis is emerging in Tanzania due to influx of thousands of Burundian refugees. Cholera and severe diarrhea have broken out among refugees in Tanzania.