U.S. authorities say they have found three more suspicious packages similar to those sent to former President Barack Obama, the Clintons and CNN.
The FBI said Thursday that two packages containing potential explosive devices were sent to former Vice President Joe Biden.
The other was sent to a New York restaurant owned by the actor Robert De Niro.
That marks a total of 10 such packages being sent to prominent Democrats and critics of President Trump over the past few days.
New York City mayor Bill de Blasio again called the act "terrorism."
Shortly after Thursday's incident, Trump seemed to blame the media, tweeting "a very big part of the Anger we see today in our society is caused by the purposely false and inaccurate reporting of the Mainstream Media that I refer to as Fake News."
The tweet came a day after he called for unity.
