From TMZ.com:

Rap legend Heavy D — one of the most influential rappers of the ’90s — died earlier today … TMZ has learned.

Heavy D — real name Dwight Arrington Myers — was rushed to an L.A. hospital around noon today … and was pronounced dead at the hospital at 1 PM. He was 44 years old.

We’ve learned a 911 call was placed from Heavy’s Beverly Hills home around 11:25 AM to report an unconscious male on the walkway .

When help arrived, we’re told Heavy D was conscious and speaking — and was transported to a nearby hospital.

He died a short time later.

Cops are investigating the death — and so far, there are no obvious signs of foul play.

UPDATE II:

Law enforcement tell TMZ … Heavy D had just returned from shopping and walked up some stairs when he began having trouble breathing. Adam Mills, a designer who was in the building and knew Heavy D, found him leaning against a railing and clearly in distress. Adam tells us he cradled Heavy D in his lap as others called 911. Adam says Heavy D was conscious and said to him, “I can’t breathe, I can’t breathe.” When paramedics took Heavy D to the hospital he had a pulse. People in the building are saying he died of a heart attack, but we have not been able to confirm that. Law enforcement sources tell us … no foul play was involved and so far they only know the cause of death was “medical.”

UPDATE I:

Heavy D died less than 24 hours after tweeting his condolences to legendary boxer Joe Frazier who died Monday, Nov. 7 of cancer. Heavy D’s final tweet was “BE INSPIRED!”