Credit: Ruffhouse Records/Columbia

UPDATE: A new medical report has confirmed that Kris Kross rapper Chris Kelly died of a drug overdose.

The 34-year-old music star was found unresponsive in his Atlanta home on May 1, and a toxicology screening now reveals that drugs were the cause, according to Huffington Post.

A medical office investigator reported the news on July 1, pointing out that it is still unknown which specific drugs Chris had taken. However, a police report revealed that Chris's mom had said her son took cocaine and heroin on the night prior to his death.

Original story: Very sad news as Chris Kelly of rap duo Kris Kross is dead at 34.

Chris was found unresponsive in his home in Atlanta on May 1, according to CNN

He was rushed to an Atlanta hospital and pronounced dead.

The cause of death is currently unknown, but more details will likely surface after the planned autopsy on Thursday.

Chris  also known as "Mac Daddy"  and Chris Smith were the two members of the child rap duo who had huge success in the early '90s with their songs "Jump" and "Warm It Up."

The group's debut album, Totally Krossed Out, was released in 1992 when Chris Kelly was 13. The album went four-times platinum in the U.S.

Part of their success was linked to the fact that they would wear their clothes backwards for some reason.

But the group never saw much commercial success after that. Their second album, Da Bomb, went platinum a year later but failed to register any big hits.

They released one last album as a duo in 1996 before going their separate ways to pursue solo careers.  

Kris Kross reunited for a one-night-only performance in Atlanta in February 2013 to celebrate the 20th anniversary of their label.

Our thoughts are with his family and loved ones during this difficult time.

Source: CNN, E! Online

Credit: YouTube.com Photo: Watch Kris Kross Performs 1992 Hit "Jump": R.I.P. Chris Kelly (VIDEO)