he Home Depot here was one of 13 stores to receive threatening letters containing a nontoxic white powder substance in recent days, according to the FBI.

The agency is investigating the mailings, which occurred between Dec. 31 and last Thursday, Ralph Boelter, special agent in charge of the Minneapolis FBI office, said in a news release.

Other Home Depot stores that received the letters included the ones Hastings, Maplewood and Inver Grove Heights and in Hudson, Wis. Other threatening letters were reportedly received at Renewal by Andersen businesses in Cottage Grove, Bayport, Roseville, Edina and Burnsville.

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