Democratic Sens. Elizabeth Warren and Tina Smith are concerned about the safety of pharmaceuticals and drug components coming into the United States, as the coronavirus pandemic has put a halt to many inspections of overseas drug manufacturing facilities.

In a letter to FDA Commissioner Stephen Hahn released Tuesday, the senators wrote: “We are concerned that, absent proper oversight of our drug supply chain and the overseas facilities manufacturing products millions of Americans rely on, patients will face an increased risk of drug contamination or other problems with quality, purity, or potency.”