The soldier was playing with a group of children outside when the attacker came from behind and stabbed him in the neck with a large knife, Khan said, adding the young man had escaped to nearby Pakistan.

NPR: Afghan Teenager Fatally Stabs US Soldier

Based on their extensive surveillance of the secret agents and their messages to handlers back in Moscow, U.S. counterintelligence officials believe the grooming of Mr. Foley was part of a long-term goal for some of the group's children to become spies when they got older.

WSJ: Russian Spy Ring Aimed to Make Children Agents

Sixteen children were slaughtered and 12 kidnapped when a group of armed men ambushed a bus taking them to school in Bouinane, just south of Algiers.

ECONOMIST: Algeria