President Barack Obama will mark the tenth anniversary of 9/11 in New York City at the formal opening of the national memorial to the nearly 3,000 people who died in the terrorist attacks, Mayor Michael Bloomberg said Tuesday.

"I certainly think it's terribly important for him to come on 9/11/11. And he will be there. At least the staff has told me that he will come," Bloomberg said at an unrelated City Hall news conference. "It's a very emotional moment in the country now. And I think it's perfectly appropriate for him to come."

A spokesman for the White House wouldn't confirm the mayor's remarks Tuesday.

Obama is set to travel to the city Thursday to visit ground zero and meet with family members of victims of the attacks in the wake of the death of Osama bin Laden, 15 years after the al-Qaida head declared war on the United States. Bin Laden was shot and killed Sunday when U.S. commandos stormed his Pakistani hideout.

The Democratic president visited the World Trade Center site along with Republican Sen. John McCain on the seventh anniversary of the attacks, when both men were vying for office. Since then, Obama has marked the anniversary each year at the Pentagon, while Vice President Joe Biden has attended ceremonies at ground zero.