Nicki Minaj crew members killed
De'Von Pickett was killed and Eric Parker critically injured after an argument broke out at Philadelphia's Che Bar & Grill.Instagram

Two crew members on Nicki Minaj's tour have been stabbed, one of them fatally.

The singer confirmed the news on Twitter stating that the two men were in Philadelphia for rehearsals.

"Two members of my team were stabbed last night in Philly. One was killed," she wrote. "They had only been there for two days rehearsing for the tour."

De'Von Pickett, a roadie, was killed after an argument broke out at Philadelphia's Che Bar & Grill. Eric Parker, suffered multiple stab wounds to his side in the incident and was taken to an area hospital in critical condition, TMZ reports.

The suspect – allegedly an ex-employee of the restaurant – is still at large. "We believe that both of the victims, as well as the perpetrator, were all inside of this bar and that's when an argument started," Chief Inspector Scott Small told NBC Philadelphia.

The Anaconda singer shared a photo of the victims on Instagram, writing: "Unbelievable. Eric (on the right) is recovering. Another senseless act of violence that took the life of a great guy. So sad."

Nicki Minaj crew members killed
Rihanna paid tribute to De'Von Pickett, describing him as one of the "coolest, funniest people I've ever met."Instagram

Pickett had also worked with Rihanna when the singer appeared on Kanye West's Glow in the Dark tour.

The singer posted a photo of Pickett with a caption that read: "Can't believe this is true! one of the nicest, coolest, funniest people I've ever met and toured with! We had so much fun together!!! Sad to lose a beautiful spirit like yours."

Police are offering a $20,000 reward for information leading to an arrest.