A U.S. Air Force veteran has been charged with trying to provide support for the Islamic State militant group, U.S. prosecutors said on Tuesday.

A federal grand jury in New York City indicted Tairod Nathan Webster Pugh for attempting to provide material support to the group and attempted obstruction of justice.

Pugh, 47, of Neptune, New Jersey, is to be arraigned Wednesday morning in federal court in Brooklyn. Michael Schneider, a court-appointed lawyer for Pugh, said his client would plead not guilty.