A young rapper who was a rising star, credited for his innovative approach blending elements of hip-hop and emo, has died. The New York Times reports that Lil Peep died Wednesday night in Tucson, Ariz. He was 21.

“A spokesman for the Tucson Police Department said Lil Peep was pronounced dead on his tour bus at approximately 9 p.m.,” The Times reports. “He had been scheduled to perform at a club called the Rock. Detectives found evidence suggesting that the rapper died of an overdose of the anti-anxiety medication Xanax.”

The report notes that over the past two years, Lil Peep “emerged as one of pop music’s brightest and most promising young talents, blending the urgency and dexterity of contemporary hip-hop with the raw, serrated sentimentality of emo.”

His death was confirmed by Sarah Stennett, chief executive of First Access Entertainment, which has worked with Lil Peep since last year. The Times quotes Stennett saying she had “spoken to his mother and she asked me to convey that she is very, very proud of him and everything he was able to achieve in his short life.”

The Times report adds: “Lil Peep was born Gustav Ahr on Nov. 1, 1996, and was raised in Long Beach, on Long Island, the son of a college professor father and an elementary schoolteacher mother. He took his name from a childhood nickname given by his mother.”