"They had only been there for two days rehearsing for the tour," wrote Minaj on Twitter. She added in an Instagram caption, "These guys flew into Philly for my tour rehearsals 2 days ago and were both stabbed last night. #RIPDAYDAY condolences to your family. Unbelievable. Eric (on the right) is recovering. Another senseless act of violence that took the life of a great guy. So sad."