Ricky Dunigan - also known as Lord Infamous of the rap group Three 6 Mafia. (Photo courtesy of Facebook)

Ricky “Lord Infamous” Dunigan of the rap group Three 6 Mafia has died. He was 40 years old.

Dunigan, who was the founding member of the band, was found dead in his mother’s home in Memphis, Tennessee Friday night. He passed away after suffering a heart attack, according to the Hollywood Reporter.

“He passed away in his sleep from a heart attack,” his half-brother, Three 6 Mafia’s DJ Paul, told The Hollywood Reporter. “He said he was tired, he wanted to sleep. He sat down at the kitchen table, put his head in his arms to lay down … to get some sleep.”

Current and former members of Three 6 Mafia took to Twitter to share their sentiments.

“Rest in Peace Lord Infamous please respect the family and dear friends during this tragedy,” band member Gangsta Boo tweeted. “I will never forget the shows we rocked together. My heart is in pieces.”

“R.I.P. lord infamous,” Three 6 member Juicy J tweeted on Saturday afternoon.

“He gave us the name #Triple6Mafia he was a pioneer, he was a god, he was my friend. RIP Ricky ‘Lord Infamous’ Dunigan,” Lil Wyte wrote.

Dunigan previously suffered a heart attack and stroke in 2010.

He founded Three 6 Mafia in 1991 and the band went on to become the first rap group to win an Academy Award for Best Original Song. They were given the award for their song “It’s Hard Out Here For A Pimp” in 2006.

Follow Lilly Workneh on Twitter @Lilly_Works