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"Kris Kross" rapper Chris Kelly had been using a combination of cocaine and heroin the night before his death, this according to the police report obtained by TMZ.

According to the report, cops responded to Kelly's home Wednesday afternoon and found the 34-year-old lying on the living room couch.

Both paramedics who arrived to the scene said Kelly was unresponsive and had "no life signs." They attempted to revive Kelly, to no avail.


Cops then spoke with Kelly's friend, Donna, who told officers ... the night before Kelly's medical emergency, he had taken a mixture of heroin and cocaine -- commonly known as "speedballs."

Donna told police she had taken Kelly home to recover from the drug use ... and said she had done this "several times in the past."

Donna told cops Kelly had felt nauseous all morning before passing out.

Kelly was pronounced dead Wednesday evening.