Kabul (Afghanistan), Apr 23 (ANI): A suicide bomber blew himself up outside a voter registration centre in the Afghan capital Kabul on Sunday (April 22), killing at least 31 people and wounding more than 50, most of them waiting in line to receive identity cards. Islamic State has claimed responsibility for the attack. It's the most serious attack in Kabul since about 100 people were killed in January. Security remains a major problem ahead of upcoming elections. A legislative vote is planned later this year - followed by a presidential poll in 2019. Afghanistan's President Ghani has been under heavy pressure from his international partners to ensure the elections are held this year, but there is widespread skepticism that they will take place.