The executions were carried out on Monday at a prison in the southern Iraqi city of Nassiriya and all those executed were Iraqi nationals, said a prison police officer and a local security official.

They declined to be named because they were not authorised to speak to the media.

They said the 11 men were convicted of joining the Islamic State rebel group and taking part in “terrorist actions”.

In a report issued yesterday, Amnesty International raised concern that many more people may have been executed in secret given a “disturbing lack of transparency” regarding executions in Iraq in recent months.

Iraq has put hundreds of suspected jihadists on trial and carried out several mass executions since defeating Islamic State fighters in US-backed military campaign in 2014-2017.