(CNN) The 16-year-old girl wounded by an armed student at Great Mills High School in southern Maryland early this week has died, her family and authorities said Friday.

Jaelynn Willey was taken off life support on Thursday and was surrounded by her family when she passed away at 11:34 p.m., the St. Mary's County Sheriff's Office said on behalf of the family.

"It is with heavy hearts and great sadness we provide this statement," the sheriff's office said.

Willey was one of two students shot by Austin Wyatt Rollins, 17, on Tuesday in a hallway just before school began, the sheriff's office said. The other victim, a 14-year-old male student, was shot in the leg and discharged from the hospital Wednesday.

Willey's uncle, Timothy Cormier, issued a post on Facebook in her memory, calling her "the most caring, thoughtful, sweet beautiful young lady I have ever met."

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