Thousands of Burundians participated in government-sanctioned demonstrations against neighboring Rwanda whom it accuses of supporting a rebellion to topple Burundi's president.

The demonstrations illustrate the souring of relations between the Central African neighbors since Burundi President Pierre Nkurunziza was re-elected for a disputed third term.

Burundi has been rocked by violent street protests since Nkurunziza's April announcement that he would seek another term. At least 400 people have died since then in violent street protests, assassinations, attacks by a rebel group and a failed coup attempt. More than 200,000 Burundians have fled to neighboring countries, mostly to Rwanda. Burundi is accusing Rwanda of training and arming rebels in the refugee population.

Rwanda on Friday said it plans to relocate 75,000 Burundian refugees to other countries following the accusations.