Sen. Richard Blumenthal (D-CT) is calling for a Justice Department investigation into allegations that a northeastern utility company fired hundreds of workers and forced them to train their less expensive foreign replacements.

In a story that has become more common, Eversource Energy has been accused of contracting with outsourcing firms to import lower-paid, foreign workers on H-1B visas to replace their American information technology staff. In the process, the 200 workers who lost their jobs were allegedly made to train their replacements and remain silent about the matter.

“I am greatly concerned about whether Eversource has violated current law,” Blumenthal wrote in a letter to Attorney General Loretta Lynch last week. “In light of these highly suspicious actions, I urge the Justice Department to use all necessary resources to investigate Eversource’s conduct with regard to these workers and determine whether the company has abused any of the nonimmigrant worker visa programs, relevant employment laws, or other rules or standards governing its behavior.”

In addition to pressing the Justice Department for an investigation, Blumenthal also expressed his “outrage” to Eversource CEO Thomas May and called on the company to offer “your former employees and the people of Connecticut a full accounting of these events.”

“According to a news report, which Eversource has not appeared to deny, your treatment of roughly 200 American IT workers in Connecticut and Massachusetts was shocking,” Blumenthal wrote in a letter to May.

“This report indicated that in the process of laying off these employees and replacing them with cheaper foreign workers who entered the US through nonimmigrant worker visa programs, you also forced them to sign non-disparagement clauses and even train their own replacements as a condition of receiving severance pay,” he added.

Blumenthal is the latest in a string of bipartisan calls to investigate recent alleged H-1B visa abuse.

Read Blumenthal’s letter to Lynch: