According to TMZ, when cops approached the bus, they noticed signs of drug use and wanted to board, but those aboard locked the doors and refused to let them inside.
Both Lil Wayne and T.I. had jetted from the city after the show, so it is unclear who was riding the bus, which was eventually towed to a police training facility with the people still inside.
Police eventually gained entry around 8am, and immediately placed several people under arrest. No word yet who was arrested or if drugs were actually found.
Update: TMZ is reporting that rapper 2Chains along with 11 passengers were arrested for "interfering with the police process." No words whether or not they found pot onboard.