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LITTLETON, Colo. (AP) - A Colorado hospital says a suburban Denver high school student has died more than a week after being shot by a classmate who then killed himself.

Seventeen-year-old Claire Davis had been in critical condition after being shot at point-blank range at Arapahoe High School on Dec. 13. Friends and well-wishers had been posting prayers online and raising money to help pay for her medical care.

Arapahoe County Sheriff Grayson Robinson says Davis appeared to be a random target.

Authorities say 18-year-old Karl Pierson was likely targeting a librarian who had disciplined him when he entered the school with a shotgun, a machete and three Molotov cocktails. Robinson says Pierson shot Davis before killing himself. The librarian escaped the school unharmed.

The following statement was posted on Littleton Adventist Hospital's Facebook page:

"It is with heavy hearts that we share that a 4:29 p.m. this afternoon, Claire Davis passed away, with her family at her side. Despite the best efforts of our physicians and nursing staff, and Claire's fighting spirit, her injuries were too severe and the most advanced medical treatments could not prevent this tragic loss of life. Claire's death is immensely heartbreaking for our entire community, our staff and our families."

The Davis family would like to thank everyone who have sent their best wishes and prayers, and are grateful for the kindness and support of the community. They know that you all are mourning with them, and again request privacy during this time of grief.