CLEVELAND and ORANGEBURG, N.Y., July 27,2007 - KeyCorp (NYSE: KEY), the holding company for KeyBank N.A., and U.S.B. Holding Co., Inc. (NYSE: UBH), the holding company for Union State Bank, a state-chartered commercial bank, today announced the signing of a definitive agreement under which Key would acquire U.S.B. Holding Co., Inc.Union State Bank, one of the leading community banks serving southern New York State, has assets of approximately $3 billion, loans of $1.6 billion and $2 billion in deposits.