As many as 31 people were killed and more than 50 injured when a suicide bombing blast took place through an election-related registering site outside a school in the Afghan capital on Sunday, officials said.

“Our latest figures found that nine civilians were killed and 56 civilians injured,” Xinhua news agency quoted a spokesman for the Interior Ministry as saying.

The blast occurred at around 10 am in front of a school where a voter registration site was located in Kabul’s Qala-e-Nazir area.

Several people were near the building to get voting cards.

Afghan officials have slated October 20 as the date for the upcoming parliamentary and district councils elections. The voter registration process started on April 14.

Terrorist group Islamic State claimed responsibility for the attack, AMAQ news agency said. They, however, did not provide any evidence to substantiate the claim.

(With inputs from agencies)