Rattan Lal, a sweeper, was arrested following interrogation of the five accused arrested earlier, police sources said.
An intracardiac defibrillator device was implanted on him, which will help cut short heart rhythm disturbances before they attain a life-threatening magnitude.
The former prime minister has a history of heart problems.
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The decision was taken at a general body meeting of the Resident Doctors' Association in New Delhi.
Here is an explainer on the functioning of the seven-year-old body.
Doctors believe the Sudarshan Kriya can help reduce stress and many other health problems.
A close associate of Indira Gandhi and Sanjay Gandhi during the Emergency when he was the defence minister, Lal is considered the architect of modern Haryana, particularly its progress in agriculture and industry.
Prime Minister Manmohan Singh on Tuesday returned to his residence at 7, Race Course Road from the All India Institute of Medical Sciences where he had undergone a surgery.
'While suppression of information is acceptable for the government, the Opposition's efforts at pinning the government and its leaders is labeled anti-national,' points out Nilanjan Mukhopadhyay.
At the rally in Shimla's Ridge Maidan to mark the eighth anniversary of becoming prime minister, Modi said, "Now our borders are more secure than they were before 2014."
The operation, performed at the AIIMS, was done to relieve pressure on a nerve near the wrist.
The 87-year-old Congress leader was admitted to the hospital on Sunday evening after he complained of uneasiness.
Vikram Bisht, who had received bullet shots in his spine, fell from his wheelchair. He is survived by wife and two kids.
Dr Arun Jamkar, former vice chancellor, Maharashtra University of Health Sciences, makes a strong case for reforming Indian medical education and believes that the National Medical Commission Bill is historic.
The team -- appointed by the Supreme Court to examine the health of the senior leader -- added that the leader is undergoing proper treatment at the residence of BSP chief Mayawati.
The AIIMS medical board on Saturday stated that Rajput died by suicide and it was not a murder.
The Delhi HC on Monday issued notice to the Centre on a fresh application which challenged the appointment of Dr Shyam Prasad as member of the All India Institute of Medical Sciences' body on the ground that he was handpicked by the Health Minister.
Meanwhile, Prime Minister Manmohan Singh's two grandsons and a son-in-law, admitted in AIIMS with symptoms of dengue, are likely to be discharged.
In the past 24 hours, at least 1,000 patients were screened for dengue.
The 86-year-old Marxist leader had been ill for some time.
The former prime minister was discharged from AIIMS for a few hours to celebrate his birthday.
Rao, 83, was admitted to the hospital's gastro ward on June 16 after he complained of loss in appetite.
rediffGURU Mayank Chandel offers advice to students interested in a careers in science or engineering after class 10 and 12.
The babies, joined at their lower abdomen and born 35 days ago, are normal, healthy and feeding well.
The Indian council of Medical Research had earlier raised the issue of medical ethics.
Naidu visited the All India Institute of Medical Sciences to enquire about his former cabinet colleague's health.
A man with severe fever was admitted to the All India Institute of Medical Sciences on Tuesday amid fears that he has contracted Ebola, which the hospital authorities are yet to confirm.
She claimed that officials haven't given her any deadline when she will get the body.
"The 750-bed modern facility will be set up at Thoppur near Madurai at an estimated cost of Rs 1,500 crore," Palaniswami said.
AIIMS has set up a special committee to look into the offers made by three NGOs to permanently take care of Neelu and Pinku.
In a video shared on social media, Aishe Ghosh is seen crying while bleeding profusely from the head.
Mishra was suffering from cancer and had been brought to New Delhi from Gwalior by Vajpayee on April 28 for specialised treatment.
