Dead & Company have postponed tonight's concert in New Orleans after member John Mayer was admitted to the hospital. The band announced the news on its Facebook page, noting that Mayer was admitted "for emergency appendectomy" earlier today.

UPDATE: Two more concerts have been canceled because of Mayer's hospitalization on Dec. 5: shows scheduled for Dec. 7 in Orlando and Dec. 8 in Sunrise, Fla. Like the earlier postponed date, these new shows will be rescheduled. Mayer's publicist says that "Mayer is recovering from the emergency appendectomy he underwent yesterday and is in good spirits."

The shows will be rescheduled, and tickets for tonight's postponed concert will be honored at that later date.

Mayer was asked by ex-Grateful Dead members Bob Weir, Mickey Hart and Bill Kreutzmann to join Dead & Company in 2015. (The group also includes bassist and drummer Oteil Burbridge and keyboardist Jeff Chimenti.) They have been appearing on stage together off and on since, including a 2017 tour that's scheduled to wrap up soon.

The 40-year-old Mayer has also been on the road with his own band in support of his seventh album, The Search for Everything, which came out earlier this year. The singer-songwriter first discovered the Grateful Dead in 2011 and soon became well acquainted with their catalog. Following the band's Fare Thee Well tour to celebrate its 50th anniversary, three of the group's core members formed Dead & Company. (Original Dead bassist Phil Lesh is not part of the new band.)

As The New Orleans Advocate notes, tonight's appearance at the Smoothie King Center marked a rare appearance by a Grateful Dead offshoot. The original band last played New Orleans in 1988, and most of the group's side projects – including the Other Ones, the Dead and Furthur – have skipped the city over the past three decades. That might have had something to do with a 1970 drug bust there that was immortalized in the band's classic "Truckin'."