A Colorado student has died in hospital more than a week after she was shot by a high school classmate.
Claire Esther Davis, 17, had been in a coma since she was gunned down at point-blank range at Arapahoe High School in Centennial.
Friends and well-wishers had been posting messages online, and raising money to pay for her medical care.
Authorities say Karl Halverson Pierson, 18, entered the Arapahoe High School armed with a shotgun, a machete and three Molotov cocktails on December 13.
Officials said Pierson had been kicked off the school's debate team and apparently bore a grudge towards the team's coach.
His attack lasted just 80 seconds. He reportedly fired one bullet down a school hallway, before shooting Ms Davis, who was sitting nearby with a friend.
Pierson then turned the gun on himself and inflicted a fatal gunshot wound.
A student stands outside the Arapahoe High School in Colorado A statement posted on the Littleton Adventist Hospital's Facebook page confirmed Ms Davis' death.
"It is with heavy hearts that we share that at 4.29pm (local time) this afternoon, Claire Davis passed away, with her family at her side," the statement said.
"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 hospital said that details about a public memorial service would be released later.
The shooting took place just a few miles from the site of last year's Aurora cinema shooting that left 12 people dead and scores wounded during a Batman movie screening.
The school is also located close to the scene of the 1999 Columbine shooting in which 13 were shot dead.
:: Watch Sky News live on television, on Sky channel 501, Virgin Media channel 602, Freeview channel 82 and Freesat channel 202.
Fatima Khan at Heathrow Airport after returning with her son's body
Dr Abbas Khan died while being held in custody in Syria
David Cameron described Abbas Khan's death as "sickening"
Two previous planes have provided an escape route for British nationals
Some of South Sudan's worst violence has taken place in Bor
Up to 500 people are thought to have been killed since the reported coup
Rick Mastracchio checks out his suit before Saturday's spacewalk. Pic: Nasa
Rick Mastracchio and Mike Hopkins on their spacewalk: Pic: Nasa
The mission is to replace a cooling pump. Pic: Nasa
Rick Mastracchio and Mike Hopkins pictured on the ISS. Pic: Nasa
Trees were brought down by the storm. Pic: CBS News
Forecasters says the storm is 'particularly strong'. Pic: CBS News
Inside the Teatro Real in Madrid where the draw was held
Second prize winner Jesus Lorente
Mr Khodorkovsky wears headphones to get translations
The prison camp in northwest Russia where Mr Khodorkovsky was held
George Zimmerman says his art allows him to 'reflect' and 'remain indoors'
The painting's listing on eBay
The 30-year-old in court
The CIA hjas declined to comment on the story