Moments after the FBI Washington tweeted that the Secret Service, U.S. Postal Inspectors and they were investigating a suspicious letter, various news outlets began reporting a package was addressed to President Donald Trump.

The package contained ricin, a deadly poison ricin, previously used in politically addressed mailings.

The poison was intercepted by law enforcement sometime this week, before it was delivered to the president, law enforcement officials informed news organizations today.

All mail addressed to the White House is sorted and screened at an off-site facility separate from the White House as a security precaution.

More reports followed indicating investigators think the letters were sent from Canada, and investigators have identified a woman as a potential suspect.

The New York Times reported letters containing ricin were also sent to federal offices in Texas. Law enforcement officials did not say how many letters containing ricin they have recovered.