The San Bernardino County Sheriff's Department said deputies responded to an apartment complex in the 15100 block of Kimberly Drive after receiving a call at about 7:12 p.m.
Victorville paramedics treated the victim, who was airlifted to Loma Linda Medical Center. His condition is unknown.
Deputies were seen coming out of a second-floor unit and searching the area for possible evidence.
Authorities are investigating and said that no suspect is in custody at the moment.
Further details were unavailable.