By Bhanvi Satija (Reuters) -The U.S. Food and Drug Administration is planning to ask Sarepta Therapeutics to voluntarily stop all shipments of its gene therapy Elevidys, a source familiar with the matter told Reuters on Friday.

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.

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