Police spokesman Pierre Nkurikiye said two people have been arrested for their alleged roles in the attacks.
The first grenade exploded around noon today in front of a telecom shop operated by Vietnamese businessmen. Another explosion happened in the parking lot for the National Post Office headquarters, damaging an empty car. A third bomb exploded in Bujumbura's open market.
Bujumbura has been wracked by violence since April 2015 when President Pierre Nkurunziza announced he would seek a third term.
