Dr. Dre’s 20-year-old son, Andre Romelle Young Jr., has died in Los Angeles.

“Dr. Dre is mourning the loss of his son Andre Young Jr.,” Dre’s publicist Lori Earl said in a statement.

Young Jr. was found unresponsive by his mother at their home in Woodland Hills, California, on Saturday. She called paramedics, who responded to the scene. After their efforts to revive him failed, he was pronounced dead.

The cause of death is currently unknown. Results of a toxicology report are pending.