Rapper Chinx Killed in Drive-By Shooting, Khloe and Rob Kardashian React

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Khloe and Rob Kardashian paid tribute to French Montana's collaborator Chinx after the rapper was fatally shot in New York early Sunday morning.

The 31-year-old rapper, whose legal name is Lionel Pickens, had performed in Brooklyn around 2:30 a.m. and after his show headed to a hookah bar, which was closed, in his Porsche Panamera 4. NYPD tell ET that Chinx was shot multiple times while the passenger in the vehicle, reportedly 27-year-old Antar Alziadi, was shot twice in the back.

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The shooter than sped off while the rapper's vehicle rolled about a block and ended up in front of a Dunkin' Donuts. Police say at least seven bullet holes pierced the front and rear driver-side windows.

The men were rushed to Jamaica Hospital Medical Center where Chinx was pronounced dead. His passenger is currently in critical but stable condition.

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Chinx released his first solo album, Hurry Up & Die Vol 1: Get Ya Casket On, in 2009 and has collaborated with Khloe's on-again, off-again rapper boyfriend, French Montana.

"We've only known each other a short time but it was the best time, full of memories that I will cherish forever!" the Keeping Up with the Kardashians star Instagrammed on Sunday. "I miss you Chinxy. #TheWolfPack #RIPChinx."

Khloe's brother Rob also paid his respects to Chinx via Twitter. "Rest in peace Chinx," he wrote. "Gone way too soon."

NYPD tell ET the investigation into the shooting is ongoing.