BAGHDAD, Nov 23 (Reuters) - The Iraqi government imposed an indefinite curfew in Baghdad on Thursday, after one of the worst days of violence since the U.S. invasion in 2003, Iraqi state television said, quoting an Interior Ministry official. Six car bombs earlier exploded in the Shi'ite district of Sadr City killing 133 people and wounding 201. The blasts, which were followed by a mortar barrage aimed at a nearby Sunni enclave, came at the same time as gunmen attacked the Shi'ite- run Health Ministry.
