Three people from a policeman family were killed on Sunday in a bomb attack in their house in the south of the Iraqi capital of Baghdad, and a police officer escaped another bomb attack with wounds in the city, Interior Ministry told Xinhua. Gunmen planted bombs at the policeman\'s house in the town of Mussayab, some 60 km south of Baghdad, and blew them up around midday, killing the policeman\'s father, mother and sister, the source said on condition of anonymity. The policeman himself escaped the explosions unhurt, the source said. The Mussayab town is part of the once restive area, dubbed Triangle of Death, which has a cluster of towns scattered between south of Baghdad and north of Hilla city, the capital of Babil province, some 100 km south of Baghdad. In a separate incident, a sticky bomb attached to a car of a police officer detonated Sunday, when he was driving in Baghdad\'s southern district of Doura, the source said. The officer escaped the blast with wounds, the source added. Violence in Iraq has decreased from its climax in 2006 and 2007, when sectarian conflicts pushed the country to the brink of a civil war, but tensions and sporadic shootings and bombings remain common across the country.