Chicago Bulls forwards Bobby Portis and Nikola Mirotic were reportedly involved in a "serious altercation" at practice Tuesday that sent Mirotic to the hospital.

According to The Vertical's Shams Charania, Mirotic—who recently returned to the Bulls on a two-year, $27 million deal—will be out indefinitely as a result.

Citing league sources, Charania reported Mirotic was transported to the hospital "after their shoving altercation during practice ended with an alleged cheap shot from Portis to Mirotic’s face."

According to ESPN's Adrian Wojnarowski, Mirotic "suffered a fractured bone in his face" and Charania reported the 26-year-old is expected to be sidelined for the "foreseeable future." CSN Chicago's Vincent Goodwill added Mirotic is being evaluated for a possible concussion.