A report cited by CNBC says U.S. Immigration and Customs Enforcement agents were recently informed that the FBI will no longer handle claims of assault involving federal immigration officers. The development, first reported by The New York Times, centers on how confrontations linked to immigration enforcement may be reviewed.

The reported shift immediately raised questions about oversight and accountability in cases involving ICE agents. If accurate, it would mark a notable change in which federal agency examines allegations tied to physical confrontations with immigration officers.

At the same time, the Department of Justice and the Department of Homeland Security have denied that any change in oversight has taken place. Those denials leave an unresolved gap between what was reportedly communicated to ICE personnel and what the agencies are publicly saying.

The conflicting accounts have put renewed attention on the relationship between the FBI, ICE and the broader federal system for investigating incidents involving law enforcement officers. With official agencies disputing the report, the status of any policy change remains unclear.