U.S. regulators asked Sarepta Therapeutics on Friday to voluntarily halt shipments of its Elevidys gene therapy after a muscular dystrophy patient who received a different, experimental treatment died,

Sarepta's gene therapy pipeline faces renewed scrutiny after a third patient death and FDA plans for a black box warning on Elevidys.

The patient, who was being treated with an investigational gene therapy for limb-girdle muscular dystrophy, died of acute liver failure, the same complication responsible for the deaths of two boys taking Sarepta's Duchenne muscular dystrophy treatment Elevidys.