Photo courtesy: Dan Kitwood—Getty Images
By TIME
November 14, 2014

This post is in partnership with Time. The article below was originally published at Time.com.

By Alex Fitzpatrick, TIME

The Justice Department is using equipment on board aircraft that simulates cell towers to collect data from criminal suspects’ cell phones, according to a report Thursday.

The Wall Street Journal, citing unnamed sources familiar with the operations, reports that a program operating under the U.S. Marshals Service is said to use small aircraft flying from five different airports around the country. Devices aboard those planes called “dirtboxes” essentially trick the suspects’ cellphones into thinking they’re connecting to legitimate cell towers from big wireless carriers like Verizon or AT&T, allowing the feds to scoop up personal data and location information about those targeted.

However, the report details those devices could be gathering data from “tens of thousands” of Americans in a single flight, meaning nonsuspects are likely to be included in the data roundup. The new report could shed some light onearlier reports of mysterious “phony” cell towers that security researchers have found around the country.

Read more at the Wall Street Journal

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