Department of Atomic Energy scientists on Friday cleared a Delhi scrap market of radioactive material after 12 hours of investigation and search, and sanitised five shops after four people fell ill due to radiation.
The scientists searched the contaminated site in west Delhi's Mayapuri area throughout Thursday night and till Friday forenoon and found several pieces of the radioactive material in the market.
"The material was removed and packed in a shielded container. The radiation level in the area has come down to normal level. The road cordons have been removed," said an official.
"The scrap shop where the radioactive material was kept was found to have a high radiation field. Four nearby shops also indicated high radiation field," the official added.
Experts reported that the radioactive substance is Cobalt-60.
Four people suffered burn-like injuries after coming in contact with the radioactive material in the scrap market in Mayapuri area on Thursday. Earlier, the scrap dealer Deepak Jain also suffered burns and is battling for life at the Indraprashtha Apollo Hospital.
Jain was admitted to the hospital April 4 and "his bone marrow is significantly suppressed", a hospital bulletin said Friday.
"His condition continues to be serious," it added.
"Currently, he is in the Intensive Care Unit (ICU) and a multidisciplinary team of doctors is monitoring his progress," the hospital said.
Jain's body turned black when he touched the material, according to eyewitnesses.
Scientists from the Bhabha Atomic Research Centre, Mumbai, arrived in the capital on Friday to probe the incident.
The prime minister and the home ministry were subsequently informed.
"Around half a kilometre of the area has been sealed as a precautionary measure, but the public has not been evacuated from the area," Joint Commissioner of Police Ajai Kashyap said.
Police were trying to ascertain the source of the radioactive material, said deputy commissioner of police (west) Sharad Aggarwal.