The mother of Chris Kelly, one half of '90s rap duo Kriss Kross who was found dead on Wednesday, said the rapper likely died of a suspected drug overdose from taking cocaine and heroin the night before.

Kelly’s mother, 54-year-old Donna Kelly Pratte, and uncle Lamar Williams told police that Kelly’s history of drug abuse and similar incidents in the past are the likely cause of his death.

Pratte told Atlanta authorities that her son had taken "a mixture of heroin and cocaine” the night before and was brought home that evening “to recover from the drug use.” She added that her son felt nauseated on Wednesday morning before he was found dead in his south Fulton County home around 4:30 p.m. later that day, Entertainment Tonight reports.

Williams said Kelly reportedly “had an extensive history of drug abuse.”

"It appears it may have been a possible drug overdose,” Fulton County Police spokeswoman Cpl. Kay Lester told the Associated Press.

Kelly was found unresponsive Wednesday on his living room couch in his Atlanta home. Kelly was pronounced dead at a local hospital later after paramedics tried to revive him through CPR.

The Fulton County Medical Examiner's office ordered a toxicology screening to determine the cause of death after a physical examination proved inconclusive. Thursday’s autopsy showed no signs of foul play or trauma, and toxicology results will be available in about three weeks, the Fulton County medical examiner's office stated.

Kriss Kross, the duo comprised of Kelly and Chris “Daddy Mac” Smith, was most famous for their hit song “Jump” which emerged on the scene in the 1990s. Kelly and Smith were only 13 years old when Jermaine Dupri discovered them in a mall, according to Billboard.

So So Def, the duo’s record label, released a statement on Thursday about the rapper’s death.

"It is with deep sadness that we announce that our beloved Chris Kelly has passed away on May 1. To millions of fans worldwide, he was the trendsetting, backwards pants-wearing one-half of Kris Kross who loved making music. But to us, he was just Chris, the kind, generous and fun-loving life of the party. Though he was only with us a short time, we feel blessed to have been able to share some incredible moments with him. His legacy will live on through his music, and we will forever love him," the statement read.