Norwegian surgeons treating victims of “counter-jihad” terrorist Anders Behring Breivik report that in the attack on the children’s summer camp, the killer used “dum-dum” rounds designed to do maximum damage.

The chief surgeon at a hospital treating victims of Norway’s camp massacre says the killer used special bullets designed to disintegrate inside the body and cause maximum internal damage. And ballistics experts say so-called dum-dum bullets also are lighter in weight, can be fired with greater accuracy over varying distances and are commonly are used by air marshals and hunters of small animals.

Colin Poole, head of surgery at Ringriket Hospital in Honefoss, northwest of Oslo, told the AP news agency surgeons treating 16 gunshot victims have recovered no full bullets:

These bullets more or less exploded inside the body … These bullets inflicted internal damage that’s absolutely horrible.