Jennifer Nettles, left, and Kristian Bush from the band Sugarland. (Evan Agostini/AP)

Seven people were killed and dozens injured when a severe thunderstorm collapsed a stage the country group was set to play on. “Unfortunately, this tragedy could have been prevented if the responsible parties had been concerned about the concertgoers that night,” lawyer Mario Massillamany said in a statement.

The suit, filed by 44 survivors and the family members of four people who died, seeks unspecified damages from the band , Live Nation and other parties responsible for producing the show.

Sugarland singer Jennifer Nettles expressed her sadness over the collapse on the band’s blog: “There are no words to process a moment of this magnitude and gravity. There are only prayers for peace in the hearts of the bereft, and prayers of thanksgiving for those who were spared or safe.”

The band has not commented on the lawsuit.