Two Republican senators defended themselves on Friday against heavy criticism, including calls that they resign, for selling substantial amounts of stocks before the coronavirus-induced market meltdown and after closed-door briefings on the outbreak.

Senate Intelligence Committee Chairman Richard Burr sold up to $1.7 million worth of stock on Feb. 13 in 33 separate transactions after offering public assurances the government was ready to battle the virus. His financial filings were first reported by ProPublica.

Sen. Kelly Loeffler also sold millions of dollars in shares in the weeks after lawmakers were first briefed on the virus, according to public filings.