United Kingdom, Sept. 19 -- Massive Attack have removed their catalogue from Spotify in protest at chief executive Daniel Ek's £520 million investment in the military artificial intelligence company Helsing - making them the first major-label act to take such a step.

The group, whose members Robert Del Naja and Grant Marshall are longstanding political activists, said they could not continue to have their music available on a platform whose founder was profiting from battlefield technologies.

Mr Ek is also chairman of Helsing, whose AI software interprets sensor and weapons data for military decision-making and whose HX-2 drone is built for frontline combat.

His venture capital firm, Prima Materia, led Helsing's latest funding rou...