At least four Afghan intelligence agents were killed and dozens of civilians were wounded Sunday when a group of Taliban militants attacked an intelligence bureau in central Afghanistan, officials said. Six attackers armed with small arms and suicide vests attacked a National Directorate of Security (NDS) building in Maidan Shar, the capital city of Wardak province south of the capital Kabul, provincial spokesman Attaullah Khogyani told AFP. \"Five attackers and four intelligence officers were killed in the ensuing clash. Thirty civilians were wounded,\" he said.