Saturday's bloodshed appears to be the worst in Iraq since Sept. 9, when insurgents launched a wave of bombings and other attacks that left at least 92 dead.
The attacks occurred in spite of increased security for a major Muslim holiday. The deadliest blast happened on the outskirts of Baghdad, where playground equipment had been set up in a market for the holiday.
Police say eight people were killed, including four children. Elsewhere, a bomb attached to a bus carrying Iranian Shiite pilgrims killed five people on their way to a Baghdad shrine. A car bomb near a market in the Shiite neighborhood of Sadr city killed seven people, and a second blast half an hour later killed six at one of Sadr city's bus stations.
In the northern city of Mosul, gunmen broke into the houses of two families, killing a boy and his parents in one and a mother and daughter in the other.
(Copyright 2012 The Associated Press. All rights reserved.)