Twelve people, including policemen and residents of Mayapuri area in west Delhi, were sent to New Delhi-based Institute of Nuclear Medicine and Allied Sciences (INMAS) on Friday to undergo investigations to detect if they had been exposed to radiation.
The step has been taken after 10 sources of Cobalt-60 were recovered from the scrap market in Mayapuri last week.
Seven persons were earlier hospitalised with burn injuries caused due to radiation. Another man has now been found to be suffering from similar symptoms.
"Twelve people, including some policemen deployed in Mayapuri area, were sent to us to undergo some investigations in regard to radiation exposure. More will be sent tomorrow," an official with INMAS said.
Another case of exposure to radiation was found, making this the eighth case in the city.
Ajay Jain, admitted to Max Hospital in Pitampura, has recovered after treatment. "He has no symptoms of radiation exposure anymore. He was brought to us with patches in the skin and burn injuries in the back on April 10," said Jain's doctor.
Condition of two other victims of radiation remains serious one week after they were admitted to different hospitals in the city.
"Rajinder (35) has shown no signs of improvement. He has low blood cell count and has developed mild fever," said an official of All India Institute of Medical Sciences (AIIMS), where Rajinder is admitted.
Deepak Jain, the scrap dealer who suffered serious burn injuries and was admitted to Apollo Hospital, continued to remain in serious condition.
The other five - Babloo (28), Ram Kalap (33), Gaurav (19), Himanshu Jain (20) and Ramji Yadav (28) are slightly better, their doctors said.
Dr Randeep Guleria, professor of medicine at AIIMS, said, "These patients will not recover immediately. Their condition will fluctuate. It all depends on the amount of time they were exposed to (radiation)."
All victims of radiation are under close monitoring by a team of experts from the Departments of Medicine, Medical Oncology, Radiological Oncology and Haematology under the overall coordination of Dr A B Dey.