A powerful explosion killed four people and wounded five in the breakaway Georgian region of Abkhazia, a top security official said Monday. It was the fifth bombing in a week in or near Abkhazia. The security official, Yuri Ashuba, said the latest bomb went off late Sunday in the town of Gali near the office of the Abkhazian security service, killing a regional security chief and a female resident. A local serviceman and a translator with the U.N. mission were brought to a hospital with severe wounds and died in hospital, according to a report of the Associated Press.