Homicide investigators said the man and the woman were a married couple, 23 to 29 years old, living across the street from the scene.
Witnesses said the couple was having a heated argument about 11 a.m. Witnesses told authorities the man appeared to be arguing with the woman when he pulled out a gun, shot the woman, then himself.
The deceased individuals were identified as Daveon Stubblefield, 29, and Ashante Stubblefield, 23. Both were Adelanto residents.
Several people, including children, were at the bus stop at the time. City and school buses make stops at the bus stop.
Local school officials were on scene earlier Friday to ensure parents could get students to their appropriate locations. Children were diverted around the crime scene.
San Bernardino sheriff's homicide detectives have been investigating the scene since early Friday morning. One of the victims' mother was interviewed.
"Homicide detectives have since determined that they were a couple, they were married," said Cindy Bachman, San Bernardino County Sheriff's Dept. spokeswoman. "They were involved in an argument. During that argument the male pulled out a gun. He shot the female and then shot himself."
The uncovered bodies remained at the scene while the investigation continued early Friday evening.