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 Inc. said another patient has died from acute liver failure after receiving one of its gene therapies, putting additional pressure on the biotech company after the recent deaths of two teenage boys.

When three patients die after taking a cutting-edge drug, most companies hit the brakes. Not Sarepta Therapeutics. The Massachusetts-based biotech company is under fire for refusing a request from the U.