New York, June 12 (IANS) Singer Chris Brown reportedly sent a bottle of champagne to ex-flame singer Rihanna when he found out they were at the same nightclub.

Both of them chose to sit at different tables at the nightclub named SL Saturday, reports femalefirst.co.uk.

Chris and Rihanna sat a few tables away from each other and shot dirty looks at each other all night, said a source.

The 24-year-old singer also crossed Brown's table, but managed to walk without showing any emotions.

No one saw them actually interact. Rihanna was escorted to the bathroom multiple times and walked by Chris' table each time, not even batting an eyelash, the source said.

Rihanna and Brown recently worked together on two tracks - Turn up the music and Birthday cake. The two had split in 2009 after Brown was accused of assaulting Rihanna.