SALT LAKE CITY (AP) — A U.S. Navy veteran in Utah was arrested Wednesday in connection with suspicious envelopes that were sent to President Donald Trump and top military chiefs.

William Clyde Allen III, 39, was taken into custody in in the small northern Utah city of Logan, said Melodie Rydalch, a spokeswoman for the state's U.S. attorney's office.

The arrest comes after authorities confirmed an investigation into two envelopes once thought to contain ricin and later found to be castor seeds, the substance from which the poison is derived. They can cause injury if swallowed.

The FBI said ther...