The State Department will abandon decades of tradition at the annual U.N. General Assembly this fall by setting up shop in a hotel other than New York’s famed Waldorf-Astoria.

A Chinese company bought the Waldorf last year.

Officials say the department will base its U.N. operations at the New York Palace Hotel. The officials aren’t giving a reason for the switch, which will affect hundreds of American diplomats and support staff who travel to New York for the General Assembly each September and stay at the Waldorf.

But officials are pointing to Hilton Worldwide’s sale of the Waldorf-Astoria to the Beijing-based Anbang Insurance Group for $1.95 billion last year. The sale prompted security concerns.

The U.S. suspects China-linked hackers were behind a recent massive hack of federal personnel records.

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