Xinhua) -- At least four people, including three policemen, were killed and seven others injured in clashes and attacks in Iraq on Friday, a police source said.
Three policemen were killed in clashes with gunmen early Friday in the city of Fallujah, 50 km west of the Iraqi capital Baghdad, the source told Xinhua on condition of anonymity.
Elsewhere, a worshiper was killed and four others were wounded when a roadside bomb exploded near a Sunni mosque after Friday prayers in the Saidiya area in southwestern Baghdad, he said.
Also on Friday, an Iraqi police officer and two civilians were wounded when a roadside bomb exploded near a checkpoint in Sharqat, some 280 km north of Baghdad, he added.
The attacks came amid escalation of sectarian tension between the Sunni and Shiite communities in Iraq, which has been at its highest level since the U.S. troops pulled out from the country at the end of 2011.