Two children, aged nine and 11, have become the world’s youngest to be euthanised, according to a report.

The unnamed minors were administered lethal injections in Belgium, which has the world’s only law allowing terminally ill children in “unbearable suffering” to choose to die.

Their deaths, which occurred in 2016 or 2017, were revealed in a report from the CFCEE; the commission that regulates euthanasia in Belgium, and their ages were confirmed by a Belgian official.

It confirmed that Belgian doctors had given lethal injections to three children over the two-year period, including to a 17-year-old who was suffering from muscular dystrophy.

The nine-year-old, who had a brain tumour, and the 11-year-old, who was suffering from cystic fibrosis, were the first children under 12 to be euthanised anywhere, a member of the CFCEE told The Washington Post.

One of the most permissive countries in the world, Belgium amended its euthanasia law in 2014 to make it legal for doctors to terminate the life of a child, however young, who makes the request.

They must be judged to have the mental capacity to make the decision and receive parental consent.

Supporters of the law say a child should not be made to suffer against their will but opponents say children are too young to make the decision to die.