Civilians killed in deadliest Kabul attack since US withdrawal

Islamic State suspected of carrying out bombing outside mosque in Afghan capital

At least five civilians have been killed in a bomb blast at the entrance to a Kabul mosque on Sunday, a Taliban official said, the deadliest attack in the Afghan capital since US forces left at the end of August.

There was no immediate claim of responsibility, but suspicion fell on Islamic State extremists, who have stepped up attacks on the Taliban in recent weeks, particularly in the IS stronghold in eastern Afghanistan.