A man hospitalized at the All India Institute of Medical Sciences (AIIMS) earlier this month after radiation exposure, died of multiple-organ failure on Monday.
Thirty-five year old Rajender, a worker in the Mayapuri scrap market, was admitted here on April 13.
"Doctors told us that he has died then we came to know. He fell sick after radiation exposure. On Friday he began coughing so doctors shifted him to ICU (Intensive Care Unit)," said Ajit Kumar, relative of Rajender.
Four other radiation exposure patients are still in AIIMS.
Ten sources of Cobalt-60 had been discovered in the market.
Cobalt-60 is a radioactive isotope of cobalt, which is a hard, lustrous, grey metal. It is used in cancer therapy machines and other medical equipment.