Karrueche Tran fires back after Chris Brown associate makes gun threat

Chris Brown's ex-girlfriend has blasted the R&B star and his entourage after one of the singer's posse posted a gun threat online aimed at her friend Marques Houston.

A photo of Karrueche Tran lying on her front in a revealing bathing suit prompted the singer to compliment her backside on Twitter, but his comment didn't sit well with one of Brown's associates, who is reportedly a former gang leader.

He replied with a post of a photo of two guns and added the caption, "I don't care if they not still together", suggesting Houston should be more careful with his tweets.

Tran, who split from Brown earlier this year (15) after it was revealed he had fathered a child with another woman, has now jumped into the drama, stating, "I thought we have all matured and moved on... especially since Chris has been seen with multiple women since the breakup."

The model adds, "I don't want anything to do with any type of violence or negativity."

Brown has yet to directly comment on the photo of his ex, Houston's remarks or his associate's gun threat.