A package has been found containing what appeared to be an explosive device in a mailbox outside the residence of financial billionaire George Soros in New York.
A house employee in Katonah, New York, opened the package and revealed what appeared to be an explosive device, police said Monday.
Soros was not home at the time, the New York Times reported.
Soros, one of the world's biggest donors to groups and liberal causes, has become a hate figure for right-wing activists in the United States and Eastern Europe, and the target of a hostile media campaign by the nationalist government in his native Hungary.
Authorities were contacted around 3:45 p.m. (7:45 am GMT), the Bedford City Police Department said in a statement.
The bombing technicians detonated the package in a nearby wooded area, police told the newspaper. The FBI was investigating the incident, police said.
A spokesman for the Hungarian government said: "The matter is under the jurisdiction of the US authorities, after all, the incident happened there." He refused to make more comments.
Reuters news agency