Baghdad (CNN) -- Twin roadside bombs exploded in an outdoor market in northwestern Baghdad Saturday, raising fears that a recent surge in violence is not over.
The attack on the Bab al-Darwaza market in the Shiite neighborhood of Kadhimiya killed at least 11 people dead, Baghdad police officials said.
In separate incidents, gunmen killed two Baghdad police officers and another officer was fatally shot outside his house, the officials said.
Violence has dropped dramatically 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 have been on the uptick recently as the country still smolders with sectarian tension and political infighting.
Baghdad's Shiite-dominated government has blamed the recent attacks on Sunni insurgents with ties to al Qaeda.
No one immediately claimed responsibility for Saturday's blasts at the market.
Last month, 365 people, including police and soldiers, were killed -- the deadliest month since August 2010.
There have been a number of high profile attacks, including one day in September when nearly 80 people were killed in a series of attacks across the country.