Grenade blast wounds 33 at Ethiopian bus station

“This does not appear to be a terrorist attack. It seems a passenger was carrying the grenade in their luggage and it detonated accidentally,” federal police commander Demash Hailu told Reuters.

In the past, Ethiopia has accused arch-foe Eritrea of backing rebels who have bombed civilian targets in Addis Ababa.

Blasts at two petrol stations killed two people a day after local, regional and federal elections in April 2008, then a bomb tore through a minibus taxi a month later, killing six.