(CNN) -- A car bomb exploded near an Iraqi army convoy in Baghdad on Thursday morning , killing at least four people and wounding 11 others, police said.
This attack comes after a spike in violence last month.
There were 365 deaths reported in September, the Interior Ministry said this week. That's the deadliest single month since August 2010, when the toll reached 426, according to the ministry.
Before the rise in deaths in September, violence had dropped drastically in Iraq since the peak of Sunni-Shiite clashes in 2006 and 2007 and the withdrawal of U.S. troops from the country in December.
But insurgent attacks against civilians and security forces persist as the nation smolders with sectarian tension and political infighting.