The Food and Drug Administration plans to ask Sarepta Therapeutics Inc. to pause shipments of its Elevidys treatment after three deaths were linked to the company’s gene therapies, according to a person familiar with the matter.

The U.S. Food and Drug Administration will request Sarepta Therapeutics to voluntarily stop all shipments of its gene therapy, Elevidys, a source familiar with the matter told Reuters on Friday.

The company had previously halted shipments to certain older patients following the deaths of two teenagers treated with the therapy, Elevidys.