New Delhi, May 2 -- Iran's imprisoned Nobel Peace Prize laureate Narges Mohammadi has been urgently transferred from prison to a hospital in northwestern Iran after a "catastrophic deterioration" of her health, her foundation said Friday.

The Narges Mohammadi Foundation said the Nobel Prize laureate had two episodes of complete loss of consciousness and a severe cardiac crisis.

Earlier Friday, Mohammadi had fainted twice in prison in Zanjan in northwestern Iran, according to the foundation. She was believed to have suffered a heart attack in late March, according to her lawyers who visited her a few days after the incident. At the time, she appeared pale, underweight and needed a nurse to help her walk.

The hospital transfer comes "aft...