United Kingdom, June 17 -- R. Kelly was rushed to hospital after he suffered a near-fatal overdose in prison.

According to a new filing by his attorney, Beau Brindley, the 58-year-old singer - who is serving 30 years in a North Carolina prison for sex trafficking and racketeering - was placed in isolation on June 10 with his anxiety medication.

After being given more medication by prison staff, he lost consciousness three days later and was taken to Duke University Hospital on June 13.

After two days under observation, he was taken back to his cell.

The attorney shockingly claims that officers intentionally "gave him an amount of medicine that could have killed him."

He said in the documents: "This was no mistake. It was a dose that ...