(DALLAS) -- The FBI and U.S. Postal Service are teaming up to reward anyone with information that leads to identifying the person responsible for sending more than 300 letters across the country filled with white power, ABC News Dallas affiliate WFAA-TV reports.
More than 380 letters with white powder were sent to addresses in 48 states since 2008. Seven white powder letters were reported across North Texas. A total of 20 letters were reported across the entire state.
Officials are offering a $150,000 reward for information.
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