ISIS have issued a fatwa which orders children with Down syndrome and other disabilities to be killed in a chilling echo to the workings of the Nazis, it is claimed.

Sharia judges have apparently ruled that ISIS followers are authorised to 'kill newborn babies with Down syndrome or congenital deformities and disabled children' in their latest sickening act.

More than 38 children born with deformities and Down syndrome, aged between one week and three months, have already been killed by lethal injection or suffocation, according to Iraqi activist group Mosul Eye.

The organisation, which released the a video report highlighting the depraved acts, said the killings took place in ISIS strongholds in Syria and Mosul, northern Iraq.

Sharia judges have apparently ruled that ISIS militants are authorised to 'kill newborn babies with Down syndrome or congenital deformities' or those who are disabled. Pictured: Footage taken by Mosul Eye reporting on children under ISIS control. It is not known if these were among the children targeted by jihadists

Mosul Eye said it monitored the deaths of children born with Down syndrome and found they are mostly those of foreign fighters who married Iraqi, Syrian and Asian women.

The group said during its investigation it discovered that the fatwa was issued by one of Islamic State's Sharia judges, a Saudi judge named Abu Said Aljazrawi.

A statement from the group said: 'Through monitoring and following the death incidents of children with Down syndrome and congenital deformities, we were able to learn that the Shar'i Board of ISIL issued an 'Oral Fatwa' to its members authorising them to 'kill newborn babies with Down's Syndrome and congenital deformities and disabled children'.

'As if it is not enough for ISIL to kill men, women and the elderly, and now, they kill children.'

If true, it means ISIS has followed the same direction as the Nazis, who killed disabled children because they deemed them to be a 'burden on the state'.

More than 38 children born with deformities and Down syndrome, aged between one week and three months, have been killed by injection or suffocation, according to Mosul Eye which released a video report (pictured)

At least 5,000 people aged under 16 were murdered during Adolf Hitler's reign of terror, with so-called special children's wards set up specifically for the killing of those who were severely mentally and physically handicapped.

Child euthanasia, the name given to the depraved murders, was a precursor to the subsequent murder of children in the concentration camps.

Responding to Mosul Eye's statement about ISIS possibly using similar methods to those in the Nazi era, hundreds replied to condemn their barbaric actions.

One user described ISIS as 'worse than the Nazis', adding: 'I have just shed tears for these babies. I have two children with special needs, my heart is breaking.