Drake goes ballistic after being robbed for 2 to 3million in jewelry

Drake went ballistic early Wednesday morning after learning one of his tour buses was targeted by thieves, who made off with 2 to 3 million dollars in bling.

Drake and Future were performing at the Talking Stick Resort Arena in Phoenix Tuesday night when a thief or thieves made it onto a bus shared by the 2 rappers. They took a briefcase that contained millions of dollars in jewelry.

We're told the jewelry was Future's, but the video is clear -- Drake was super upset when he learned about the heist.

We're told detectives are reviewing security footage to ID the culprits.