Burundi's electoral commission says preparations for Tuesday's presidential election are complete even though the opposition continues to protest incumbent President Pierre Nkurunziza's candidacy for a third term in office.

Electoral commission spokesman Prosper Ntahorwamiye said Monday that ballot boxes and papers have been distributed to 11,493 voting centers and security has been beefed up to ensure a smooth voting process.

Ntahorwamiye said they expect a high turnout of the 3. 8 million registered voters because of improved security that has encouraged refugees to return. He said eight candidates will be on the ballot.

Burundi has been rocked by violence that has killed more than 100 people, the majority in street protests against Nkurunziza's candidacy announced in April. Critics say Nkurunziza is violating the two-term constitutional limit set for the presidency.