It was not clear if the blast was a suicide attack and whether it was caused by a car bomb or a mortar round.
On Thursday, one person was killed and 14 others injured in another bomb attack in Kadhimiyah.
Kadhimiyah has suffered routine attacks and some of the deadliest incidents in the capital since the US-led invasion in 2003.
In a second attack on Saturday, three people were killed in Jurf al-Sakhar, on
Baghdad's southern outskirts, as Iraqi soldiers and police were trying to defuse a roadside bomb.