Unidentified gunmen opened fire on Sunni Muslim worshippers at Friday prayers in two mosques south of Baghdad, killing two people and injuring four,police said. The first attack occurred when a lone gunman entered the Mizael Basha mosque in near the town of Zubeir, 20 kilometers (12 miles) southwest of Baghdad and sprayed automatic fire on worshippers during dawn prayers. One man was killed and four injured, police Col. Nouri al-Fayadh said. Another Sunni mosque, the al-Rashidiya, was later attacked by a group of gunmen who fled after shooting dead a guard, police was quoted as saying by The Associated Press.