A grenade attack near a market and a bus station in Kigali Tuesday killed one person and left another eight wounded, Rwandan police spokesman Theos Badege said.
"We have eight wounded and one dead," he said, adding that the blast went off at 1640 GMT near the Kimironko market in the capital Kigali.
"We have arrested two people and investigators are currently interrogating them," he told AFP. "It's a very busy area. They were apparently trying to cause maximum casualties."
He did not elaborate on the identity of the suspected perpetrators of the attack or their motives.
Kigali has a reputation as one of Africa's safest capitals and the latest such attack there dates back to early 2012, when a blast blamed on the DR Congo-based FDLR rebel group killed at least two.