Metallica [ tickets ] canceled the second of two concerts in Stockholm, Sweden, after frontman James Hetfield became ill and was briefly hospitalized, according to Rolling Stone. A band spokesperson told the publication that Hetfield was diagnosed with dehydration caused by a stomach bug.

The crowd was already in the venue when Hetfield's bandmates--Lars Ulrich, Kirk Hammett and Robert Trujillo--took the stage to announce that the show was canceled.

Hetfield was treated and released from the hospital the same day.

The concert will be rescheduled sometime this spring, according to a statement at the band's website.

Metallica--which will be inducted into the Rock and Roll Hall of Fame in April--reportedly will return to Sweden on July 18 for a previously scheduled show at the Sonisphere festival.