The United Nations' top disarmament official also warned governments of the implications of so-called killer robots that could take military decisions out of human hands.

Google reportedly plans not to renew a contract with the U.S. military to provide artificial intelligence help for use in drone strikes, amid a wave of protests from its own employees.

Concerns grow over Ottawa's artificial intelligence push.

A bomb delivered by a police robot that killed a sniper, ending a deadly ambush on Dallas police, caused severe damage to a hallway at a downtown Dallas community college building.

It's still unclear how the gunman obtained an honourable discharge from the military even though Army officials sent him home from Afghanistan with a recommendation that he be thrown out of the armed forces.

Military service changed the Dallas gunman from an extrovert into a hermit, his parents said in an interview excerpt published Monday.

The Dallas Police Chief defended the use of a bomb-carrying robot to kill Micah Johnson saying he "would do it again to save our officers lives."

Technology allowing a pre-programmed robot to shoot to kill, or a tank to fire at a target with no human involvement, is only years away, experts say. A new report called Monday for a ban on such "killer robots."

Scientists and tech experts - including Stephen Hawking and Apple co-founder Steve Wozniak - are warning of a global arms race with weapons using artificial intelligence.