Dr. Dre’s son has died.

Andre Young Jr., 20, was reported to be unresponsive when his mother Nicole Young checked on him at around 10am on Saturday, so she immediately called emergency services to her Woodland Hills house.

It is not yet known how Andre died, but toxicology tests are being carried out to determine the cause of death.

Legendary rap producer Dre and his wife Nicole had not commented on the tragedy at the time of writing.

It has been claimed Andre went out on Friday night (08/22/08), before returning home at 5.30am.

Dre - real name Andre Young Sr. - is an award winning producer, who first became famous as a member of rap group NWA.

Dre, who is currently working on new album ‘Detox’, is also credited with discovering rap stars Eminem, 50 Cent and Snoop Dogg.

The 43-year-old star also has four other children.

He has a 17-year-old son Marcel with his ex-lover, singer Michel’le as well as two kids with his ex-wife Nicole Threatt, 11-year-old son Truth and daughter Truly, seven.

Dre is also the biological father of rapper Hood Surgeon.