President of the Republic of Burundi, Pierre Nkurunziza has died after suffering a cardiac arrest.
He died at the age of 55.
Government sources said he was admitted to hospital on Saturday after feeling unwell but his condition improved.
However, on Monday he had a cardiac arrest and efforts to revive him were unsuccessful, officials say.
After 15 years in power, Mr. Nkurunziza was due to step down in August.