A Northern Virginia woman celebrating her 19th birthday at a concert Wednesday night has died after she apparently took the drug molly at a D.C. music venue, authorities said.

Victoria Callahan, whose birthday was Wednesday, was attending a concert at Echostage in Northeast D.C. when she complained of feeling sick at about 12:15 a.m. Thursday, police said.

Callahan, of Sterling, was under the influence of molly, according to a police report.

She was taken from the performance of the Australian DJ Flume to MedStar Washington Hospital Center, where she died early Thursday morning, according to a MedStar representative.

Molly, a form of MDMA, is the main ingredient in the drug ecstacy.

Callahan was a sophomore marine science major at Coastal Carolina University in South Carolina. She graduated from Potomac Falls High School in Loudoun County, where she was vice president of her senior class.

A handwritten note was left on the Callahan family's door on Thursday, asking for privacy for the family and declining to comment on the young woman's death.

A manager at Echostage, located off New York Avenue NE, declined to comment.

Police investigated in September 2013 whether a 19-year-old University of Virginia student who collapsed and died at EchoStage had taken molly, as News4 reported.