Blues guitarist BB King has issued a statement apologising for an April 4 concert in St Louis, Missouri. The statement declared that "the rigours of  a very long drive" and "high blood sugar due to a medication error" explained the disappointing performance at Peabody Opera House.

The 88-year-old singer and guitarist suffers from diabetes and apparently missed taking a dose of insulin on the day of the concert.

He had travelled from his home in Las Vegas, a 1,600 mile ride, lasting 24 hours, Moreover, the drive had followed a four-week break away from touring. The "combination" of these things, "resulted in a performance that did not match Mr King's usual standard of excellence... [he] apologises and humbly asks for the understanding of his fans," his management told the St Louis Post-Dispatch.

Daniel Durchholz reviewed King’s performance for the Post-Dispatch, observing that King's performance "(had given concert-goers) the blues. And not in a good way." Durchholz reported that King waited 45 minutes before playing "anything resembling a song", and simply sat on the stage, chatting inaudibly. "He flirted with women in the first few rows and made a few ribald comments, without apology,"  the reporter wrote.