Rihanna back with Brown?

Rihanna in race rowMagazine editor in trouble after racial slur

Reports surface that pair could have reunited...

Rumours have surfaced suggesting that Rihanna could be back with her violent ex, Chris Brown, reports the Sun.

The Rude Boy singer allegedly "let rip" after apparently spotting Brown kissing model Karrueche Tran at a Las Vegas party, the newspaper claims.

Tweets made by Rihanna and Brown have sparked rumours that the two are back together again, almost three years after he attacked her.

A recent post by Rihanna on her Twitter page read:

"How can you lie to her, while u lay with me???"

A source told the tabloid:

"Despite everything that has happened [Rihanna] has not stopped loving Chris.

"They have been in constant contact for some time and things seemed to be stepping up a gear in recent weeks. Many thought these public declarations of love on Twitter were paving the way for an official reconciliation.

"Seeing him with Karrueche is very hard for her and her emotions appear to have got the better of her this weekend.

"She has been warned by pals not to get involved in such a destructive relationship again but she just can't let go."

Brown was sentenced to six months of community services and five years probation for violently attacking Rihanna after leaving the 2009 Grammy Awards.