Unhappy news, but sadly not unexpected.
Saw BB many times in the 80's and 90's. What a great band; Russell B Jackson and then Michael Doster on bass.
Some of my favourite BB King moments were the first time I heard him, on Blues Is King (what an eye opener that was in 1967), the Blues Summit (that's what a bass should sound like) and Deuces Wild (with Pino) CD's, the classic numbers he recorded with the Crusaders and the live albums he made with Bobby Bland.