Sen. Roy Blunt, R-Mo., said Thursday that his office has heard of more possible cases of employees hired to process applications for the Affordable Care Act doing little work.

“I have heard that there have been allegations from other facilities, and we are looking into that,” he said.

Concurrently, Sen. Claire McCaskill, D-Mo., called for a federal Inspector General’s investigation, saying she has “received allegations of wrongdoing” from a whistleblower from the Wentzville plant.

Her letter to Daniel R. Levinson, Inspector General at the U.S. Department of Health and Human Services, says the whistleblower worked for Cognosante, a subcontractor of Serco, in Wentzville. According to McCaskill, the worker claims that she was called into work last fall “when the company was aware that its employees would not be able to work due to problems with the HealthCare.gov Web site.”

McCaskill’s letter says that the whistleblower alleges that employees were told to sit at their desks and “pretend to work” when officials from the federal CMS were on-site.

The fresh calls for investigations came as the White House referred all questions to CMS, which confirmed the letters are being reviewed.