Four Iraqi female students were injured in Baquba Wednesday when a roadside bomb exploded near an exam center. The bomb exploded near a high school exam center in the Mafriq district western Baquba and wounded four of the students heading to perform sixth level exams, Iraqi security sources told National Iraqi News Agency (NINA). Furthermore, a policeman was killed in an armed attack on a checkpoint Wednesday morning near Fallujah General Hospital at the city center. In other security developments in Iraq, police forces of the Maysan province arrested 31 wanted men for different charges. According to intelligence information, one of the men was arrested in a murder case. Police forces found a number of weapons including 3 rifles and 10 caches. Unidentified gunmen have killed a civilian in Mosul northern Iraq using suppressed weapons in the Nablus area, Iraqi police said.