Senator criticizes union pacific for interference in federal safety audit.

US railroad Union Pacific (UNP.N) interfered in a federal safety audit by coaching employees on how to respond, prompting the rail agency to end the review, the chair of the Senate Commerce Committee said Friday.

Senator Maria Cantwell expressed concerns over Union Pacific’s actions after the Federal Railroad Administration informed the committee that it had to discontinue its assessment “due to Union Pacific’s actions to undermine the integrity of the assessment process,” Cantwell stated.

She has requested the company to provide all documentation related to the safety culture audit, along with current policies and plans to improve its safety culture. Union Pacific has not yet responded to a request for comment.