Drugmaker Sarepta Therapeutics says it won’t comply with a request from U.S. regulators to halt all shipments of its gene therapy.

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 Therapeutics refuses the FDA request to halt its gene therapy shipments following a third patient death, challenging regulatory norms. The controversial Elevidys therapy faces scrutiny while the company deals with financial impacts,