Alphabet has rewritten its guidelines on how it will use AI, dropping a section which previously ruled out applications that were likely to cause harm". Human Rights Watch has criticised the decision, telling the BBC that AI can "complicate accountability" for battlefield decisions that "may have life or death consequences." Experts say AI could be widely deployed on the battlefield - though there are fears about its use too, particularly with regard to autonomous weapons systems. "For a global industry leader to abandon red lines it set for itself signals a concerning shift, at a time when we need responsible leadership in AI more than ever," said Anna Bacciarelli, senior AI researcher at Human Rights Watch. The "unilateral" decision showed also showed "why voluntary principles are not an adequate substitute for regulation and binding law" she added. In January, MP's argued that the conflict in Ukraine had shown the technology "offers serious military advantage on the battlefield." As AI becomes more widespread and sophisticated it would "change the way defence works, from the back office to the frontline," Emma Lewell-Buck MP ... wrote. Concern is greatest over the potential for AI-powered weapons capable of taking lethal action autonomously, with campaigners arguing controls are urgently needed. The Doomsday Clock - which symbolises how near humanity is to destruction - cited that concern in its latest assessment of the dangers mankind faces.