Pak nuclear scientist Khan in new health scare

Khan, 70, was placed under house arrest in early 2004 after admitting to selling nuclear secrets and materials to Iran, North Korea and Libya, and has been recovering from surgery for prostrate cancer in early September.

"His condition has deteriorated from what it was compared to a few days ago," his wife, Henny Khan, said.

She said her husband had been diagnosed as suffering from deep vein thrombosis, a blood clot, usually in a vein in the lower leg that can prove lethal.

"He is being treated and we have to see how it goes," she said.