UNITED NATIONS (AP) — Nobel Peace laureate Jody Williams is helping lead a campaign for a new international treaty to ban killer weapons that can select targets and fire without decision-making by a human being.

Williams said at a news conference Monday that these lethal autonomous weapons "are crossing a moral and ethical Rubicon and should not be allowed to exist and be used in combat or in any other way."

The American peace activist said the Campaign to Stop Killer Robots, which started in 2013 and now has 130 groups in 60 countries supporting it, is trying to gain support from governments...