Soon after reaching Kampala last night I heard of another grenade attack in Kigali, apparently near the bus park from which I had left that morning. The BBC reports the attack injured 7 people, and that three people have just been arrested in connection with the explosion. Josh Kron of the NYT also reports here.
Thankfully the explosion appears to have been small and casualties few; there were many opportunities for far greater damage to be done amongst the huge crowds that turned up at RPF campaign and post-election rallies, which fortunately did not take place.