BUFFALO, N.Y. (AP) — HSBC Bank USA says it will vacate Buffalo's tallest office building next year and relocate about 2,000 employees to other offices.

The move will leave the 38-floor HSBC tower without its anchor tenant and mostly empty. HSBC says it's occupied the tower for 40 years and currently fills 653,000 of its 842,000 square feet.

The building is owned by Seneca One Realty LLC. A Seneca One spokesman did not immediately respond to a request for comment Wednesday on the building's future.

HSBC spokesman Neil Brazil says all of the employees now working in the tower will move to a nearby Buffalo office building which HSBC owns and a facility it leases in the suburb of Depew by the time the tower lease expires in October 2013.