An object that appeared to be an explosive device was found in a mailbox at the home of George Soros, the billionaire philanthropist who has donated heavily to liberal causes and is a frequent target of unfounded right-wing conspiracy theories.

The Bedford Police Department said it responded to the address in the hamlet of Katonah at 3:45 p.m. Monday after an employee of the residence opened the package.

The person placed the package in a wooded area and called police, who alerted the FBI and the Bureau of Alcohol, Firearms and Explosives.

Read more: AP