Rihanna might have to call her fans off of Chris Brown's girlfriend, Karrueche Tran.

After a very public Twitter beef, things have took a turn for the violent when some of Rihanna's followers started tweeting death threats to Tran.

Some people think that most of the aggression was started when Rihanna tweeted this picture aimed at Tran with the caption "Ima Make U My Bitch."

Some of the violent tweets read:

“I hope Rihanna beat the dog s— outa yo a–,” “Watch yo back” and “I will kill you.”

Sources tell TMZ that after receiving a barrage of violent messages on Twitter, Tran is in fear of her life and refuses to leave the house without Brown’s bodyguards protecting her.

How far will this beef go? And when will the girls realize that they are fighting over Chris Brown?!