Furthur cancels concert after Bob Weir fall

Furthur is cancelling a tour date after guitarist Bob Weir fell onstage at a concert last week.

Weir said on his website Tuesday that the Grateful Dead offshoot is "unable to perform for the next several weeks ... due to unforeseen circumstances." They were scheduled to play May 9 in Napa, Calif.

Weir was quickly helped off the floor after collapsing onstage at a concert last week in Port Chester, N.Y.

The statement adds that the 65-year-old Weir plans to hit the road in late June for solo shows.

Weir formed Furthur with fellow Grateful Dead member Phil Lesh. Furthur's summer tour kicks off July 11 in Brooklyn, N.Y.

A representative for Furthur didn't immediately respond to an email seeking comment.