Suicide attackers hit the Afghan capital Kabul on Friday (September 29) near a large Shi’ite mosque, killing at least one person, police said.

The blast hit the Qala-e Fatehullah area of the city, near the Hussainya mosque, and occurred as security forces were on alert for possible attacks during Ashura, the holiest celebration in the Shi’ite religious calendar.

Security officials said at least two attackers were killed as they carried out the operation, apparently intended to hit the mosque, just a month after 20 people were killed during prayers at another Shi’ite mosque in Kabul.

The local affiliate of Islamic State has claimed several attacks on Shi’ite targets in Kabul in recent years and the government has allowed the Shi’ite community to place armed guards near mosques.