WASHINGTON - A former Navy sailor is responsible for two suspicious packages that were discovered at a Pentagon mail processing facility on Tuesday, according to Fox News.
Citing U.S. officials, Fox reports that a return address led them to the unidentified suspect.
Investigators say the packages, which were addressed to Defense Secretary James Mattis and Admiral John Richardson, initially tested positive for ricin contamination.
They say similar packages were delivered to the White House and to Senator Ted Cruz's Texas office as part of a coordinated effort.
The packages initially tested positive for ricin contamination, but the FBI is conducting additional tests on them, according to Fox News.
Additional details are available on FoxNews.com.