(FOXNEWS) — The U.S. Marshals Service has lost track of approximately 2,000 encrypted two-way radios worth millions of dollars, the Wall Street Journal reported Sunday.

The paper cited internal records obtained through a public records request in their report, adding that the problems date back to at least 2011, when marshals were using new versions of the radios in the field.

In interviews with the Journal, some marshals expressed concern that about the prospect of criminals getting hold of the missing radios and using them to gain intelligence on law enforcement activities. U.S. Marshals are responsible for protecting federal courts and judges; tracking, pursuing, and apprehending fugitives; and administering the federal witness protection program.

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