New York City Mayor Bill de Blasio spoke Wednesday on a New York grand jury’s decision not to indict NYPD police officer Daniel Pantaleo in the death of unarmed, 43-year-old Eric Garner.

“This is a national moment of grief,” said de Blasio, “and a national moment of frustration.”

Mayor de Blasio said that though many honor the tradition that police exist to protect, he acknowledged that “for so many of our young people there is a fear and for so many of our families there is a fear.”

He added that Attorney General Eric Holder and U.S. Attorney Loretta Lynch have pledged that a federal review of the Garner case will be launched.