Investigators couldn't determine how the fight broke out and who initiated it because footage captured on the surveillance camera was too dark and blurry, reported online media.
Also, all interviews conducted by the authorities toquestion the witnesses were considered inconclusive.
Brown and Drake reportedly fought over R&B star Rihanna that night. Bottles were thrown everywhere, resulting in many clubbers suffering injuries.
It was snow-balling into multiple lawsuits with some suing the club and others targeting the two artists.
Drake was briefly linked to Rihanna after she broke up with Brown following their infamous altercation in 2009 that left her with a bloody face.
The former couple has now put their dark past behind. She was recently spotted celebrating Thanksgiving in Berlin with her ex-beau.