Gene Cornish of The Rascals performs at Hard Rock Live! in the Seminole Hard Rock Hotel & Casino in Hollywood in 2013. File picture: Jeff Daly/Invision/AP

Billings, Montana — A theatre official says Rock & Roll Hall of Fame guitarist Gene Cornish of The Rascals collapsed on stage while performing in Montana.

Cornish's publicist, Melissa Kucirek, said Saturday she didn't yet have an update.

Jody Grant, programming and marketing director for the Alberta Bair Theater in Billings, says Cornish and Rascals organist Felix Cavaliere had completed the first song of a concert and Cavaliere began the second when Cornish collapsed.

Medical personnel treated Cornish on stage before he was taken to a hospital.

The Rascals' 1960s hits included "Good Lovin,'" "Groovin'" and "A Beautiful Morning." At their peak, the group reached the Top 20 of the Billboard 100 with nine songs between 1966 and 1968.

They were inducted into the Rock & Roll Hall of Fame in 1997.

* This is a developing story and will be updated as soon as more information becomes available.