NEW YORK (AP): Neither New Yorker vying for the presidency is expected to commemorate the 15th anniversary of the September 11th attacks with a visit to the site where two hijacked airliners took down the World Trade Center towers and killed thousands of people.

A spokesman for the National September 11 Memorial & Museum told The Associated Press on Tuesday that Hillary Clinton and Donald Trump are not slated to attend the annual commemoration at the former World Trade Center site on Sunday.

There is precedent for presidential candidates to visit the former Ground Zero on the anniversary of the terror attacks. In 2008, Barack Obama and John McCain made a joint appearance at the site in New York.

Neither Clinton nor Trump has unveiled their schedules for Sunday.

But both have pledged to refrain from campaigning or advertising that day.