The blast hit the Shia-dominated Sadr-City district of the Iraqi capital.
There are conflicting reports of the number of casualties. The Associated Press cited Iraqi officials who said that at least 54 were dead and 86 wounded, while Agence France-Presse said that at least 33 people have been killed in the explosions. Reuters has given the highest numbers of casualties so far, at 60 dead and 200 injured.
No group has yet claimed responsibility for the explosions.