Kabul . Afghanistan ( CNN ) -- Gunmen attacked a spy agency in eastern Afghanistan early Saturday , killing six people and leaving dozens injured , authorities said . The Taliban militant group claimed responsibility for the attack in Jalalabad city . It targeted the provincial headquarters of the national directorate of security in Nangarhar province , according to Hazrat Hussain Mashriqiwal , a local police spokesman . The attack started with a suicide bombing involving an explosives-laden truck and two assailants at the gate of the compound , he said . Six more attackers armed with guns and hand grenades then stormed into the building and battled with security forces for hours . All six assailants were killed , according to the spokesman . Most of the 45 people wounded are nearby residents injured by smashed windows or collapsed ceilings as a result of the suicide bombing , said Dr. Najibullah Kamawal , the province 's top health official . CNN 's Masoud Popalzai reported from Kabul , and CNN 's Faith Karimi wrote and reported from Atlanta .
The Taliban claim responsibility for the attack . - A suicide bomber kills at least 20 people in a crowded market place of Kandahar city, Afghanistan.