There have been outbreaks of cholera among displaced people, who are living in poor conditions.
Last week there was a failed coup against the former rebel leader, which led to a purge of Nkurunziza's cabinet, arrests of senior army, police and government officials and a crackdown on independent media.
Nkurunziza has had to postpone parliamentary elections that were supposed to be held on May 26. He’s also under pressure from the African Union and European Union to delay the presidential elections in June.
Speaking on state television last night, Nkurunziza called for peace and insisted that the presidential election will go ahead as planned - even though protests are ongoing despite a government ban.