TAMPA, Fla. (AP) — Authorities say a Florida woman mailed threatening letters containing white powder to elementary schools where she previously worked as a teacher.

Federal prosecutors say FBI agents arrested 65-year-old Maria Bassi Lauro at her Davenport home Wednesday. Records show she made her initial appearance in Tampa federal court on charges of mailing threatening communications and transmitting false information and hoaxes.

An indictment says Lauro sent the letters to three elementary schools in Polk and Lake counties between August and September last year. The recipients believed that the powder could be harmful because anthrax, ricin and other toxins can appear as a white powder.

Later analysis determined the powder was harmless. The indictment didn't suggest a motive for the threats.

Lauro was free on restrictive bail. Court records didn't list an attorney.

Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

More from this section

WASHINGTON (AP) — President Donald Trump urged the new leader of Ukraine this summer to investigate the son of former Vice President Joe Biden, a person familiar with the matter said. Democrats condemned what they saw as a clear effort to damage a political rival, now at the heart of an expl…