According to a Davie Police Department report obtained by PEOPLE magazine, someone at the Miami mansion belonging to Ross, ne William Roberts, called 911 at 3:34 a.m. for emergency medical support saying a person matching Ross' description was "unresponsive," "breathing heavy" and "slobbing out the mouth."
Ross has been hooked up to a machine that's taking over the function of his heart and lungs, TMZ reported.
However, Ross's family has denied the reports that the musician is on life support.
Fat Trel, a fellow rapper and close friend, confirmed that Ross was in a hospital, saying he was doing "good," but "is not on life support".
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Singer-rapper P Diddy asked everyone to pray for Ross.
"Let's all pray for Rick Ross," he tweeted.
Missy Eliot wrote, "Believe in the Power of Prayer... Sending Prayers up for Rick Ross."
Snoop Dogg tweeted, "Prayers up for my guy Rick Ross. Hope you pull through my brother."
Ross has had a history of seizures, suffering two within six hours of each other in 2011.