U.S. Attorney General William Barr on Monday vowed vigorous enforcement against unlawful profiteering from the coronavirus crisis, warning the hoarding of scarce “health and medical resources” to drive up prices and make a windfall will draw the attention of the U.S. Justice Department.

Barr, appearing next to President Donald Trump at the White House, said a prosecutor in each U.S. attorney’s office across the country has been tasked with leading the pursuit of fraud and other crimes stemming from the coronavirus outbreak.