(CNN) Dozens of migratory birds were killed Tuesday night when more than 300 of them struck a building in downtown Charlotte, North Carolina, the Carolina Waterfowl Rescue group said on its verified Facebook page.

The birds, identified as chimney swifts, hit the windows of the NASCAR Hall of Fame building, according to video from CNN affiliate WSOC

The organization said that of the 310 chimney swifts that flew into the building, roughly a third were killed and 100 were severely injured, sustaining broken wings, legs or other fractures.

Other birds appeared to be stunned and will hopefully be released in a few days, the group said.

The NASCAR Hall of Fame building in Charlotte, North Carolina.

On Wednesday morning, the organization posted a plea for volunteers to help in their recovery.

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