More than 300 hundred people were attending the Friday prayers when the attack happened, local security officials said.

The United Nations Assistance Mission in Afghanistan (UNAMA) also said initial reports indicate that over 100 people were killed and wounded in today's blast inside a mosque in Kunduz.

“The UN family in Afghanistan is deeply concerned by reports of very high casualties in an attack today in Sayyidabad Shia Mosque, Khanabad, Kunduz. Initial information indicates more than 100 people killed and injured in a suicide blast inside the mosque,” UNAMA said.

“Today’s incident is part of a disturbing pattern of violence: 3rd deadly attack this week apparently targeting a religious institution. Islamic State (KP) claimed responsibility for Sunday’s incident next to a Kabul mosque. Wednesday’s attack on a madrassa in Khost unclaimed,” it added.

Security forces have arrived at the scene and have started an investigation into the incident, local sources reported.

No group has claimed responsibility for the attack.