At least 15 out of 23 monkeys implanted with Elon Musk’s Neuralink brain chips have reportedly died.

Elon previously announced that Neuralink was preparing to launch human trials for the brain chips this year.

Neuralink is now facing a legal challenge from animal rights group for allegedly subjecting the monkeys to ‘extreme suffering.’

“Pretty much every single monkey that had had implants put in their head suffered from pretty debilitating health effects.”

Musk claimed that Neuralink’s brain chips will one day ‘make humans hyper-intelligent and let paralyzed people walk again.’