A whistleblower from the US Immigration and Customs Enforcement agency alleges that systemic failures occurred in the background check process for new recruits during a massive hiring campaign. The whistleblower claims that these failures created vulnerabilities that could compromise national security, including internal threats, infiltration, and foreign influence.

The allegations were made in a memo obtained by CNN, which was dated last August. The whistleblower's identity has not been revealed.

Further details about the allegations and the agency's response are available from the source, which initially reported the story, citing a memo and information from The New York Times.