Phoenix police are investigating after someone snuck onto Drake and Future's tour bus in Phoenix on Tuesday and stole nearly $3 million worth of property.

According to police, between 10 and 10:15 p.m., an unknown person boarded the bus parked at Talking Stick Resort Arena in downtown Phoenix.

The suspect took a briefcase which police said had around $3 million worth of property inside.

The rappers were performing the Phoenix stop of the "Summer Sixteen" tour at the time. 

Police are still investigating.

Video from TMZ reportedly shows Drake reacting to the news after the concert: