The mass shooting after the Nuggets' championship win in Denver on Tuesday morning appeared to be sparked by a drug deal gone wrong ... this according to cops.
A spokesperson for the Denver Police Dept. made the revelation on Tuesday afternoon ... explaining that they discovered cash, firearms and what appeared to be fentanyl at the scene -- all signs that point toward a botched drug deal.
Two people, the spokesperson said, are in police custody -- though their exact involvement remains unclear.
DEAL GONE WRONG Denver Police Department
Of the 10 people that sustained gunshot wounds, authorities said they believe five or six were innocent bystanders.