Amy Winehouse‘s husband, Blake Fielder-Civil, who has failed three random drug tests while incarcerated, has reportedly overdosed on a mixture of heroin and “another toxic substance” in London’s Pentonville prison.

Guards found Fielder-Civil writhing in his cell and immediately began emergency procedures to save his life. Blake and six other prisoners took the drug and fell ill within moments.

A prison spokesman said, “A small number of prisoners were treated in health care following the consumption of an unknown substance.”

Last week Blake reportedly told Amy that he tried to hang himself in his cell. Prison officials quickly denied that there had been a suicide attempt.

Fielder-Civil is currently awaiting trial on assault and witness tampering charges, meanwhile, Amy Winehouse has been trying to get clean and racked up five awards at the Grammys last week, dedicating an award to “my Blake, incarcerated.”

View Amy’s Grammy performance and acceptance speech.

Filed under: Amy Winehouse, Blake Fielder-Civil