The National Highway Traffic Safety Administration’s Office of Defects Investigation has closed their preliminary investigation into General Motors' (NYSE:GM) Cruise division and will take no further action.

(Reuters) -The U.S. National Highway Traffic Safety Administration said on Friday it was opening a preliminary probe into 877,710 vehicles manufactured by General Motors, after receiving reports alleging engine failure.

U.S. automobile safety regulators are closing their preliminary investigation into General Motors’ Cruise robotaxis without taking further action

U.S. auto safety regulators on Wednesday closed a probe into whether General Motors’ self-driving unit Cruise robotaxis were taking sufficient precautions to safeguard pedestrians.

US auto safety regulators ended a federal investigation into Cruise robotaxis without taking action, removing an overhang weeks after General Motors Co. decided to shutter the struggling business.

The agency said it analyzed 2,759 reports identified by Cruise that involved collisions, including 1,113 that involved a “pedestrian conflict.”