AP Photo/Massoud Hossaini A suicide bomb shook the capital city of Kabul, Afghanistan on Sunday, killing at least 31 people at a voter registration center. The Islamic State claimed responsibility for the attack, which also injured over 50 people. KABUL, Afghanistan (AP) — A suicide bomber struck a voter registration center in the Afghan capital on Sunday, killing at least 31 people in an attack claimed by the Islamic State group. Public Health Ministry spokesman Wahid Majro said another 54 people were wounded in Sunday's attack, updating an earlier toll.