Pfizer and Moderna are said to apply for emergency approval for their COVID-19 vaccines by late November as the country crossed eight million confirmed cases.
The four were arrested while they were on their way to Hathras, the home to the 19-year-old Dalit woman who was allegedly gang-raped and murdered.
Ahmed was arrested along with three others from Mathura when they were heading to Hathras district from Delhi on October 5.
Police have registered 19 FIRs across the state in connection with spreading rumours and trying to vitiate the atmosphere.
The Union Government's evasive response comes at a time when the Karnataka cabinet which discussed a ban on PFI, is yet to recommend it officially to the Centre.
The Karnataka Cabinet on Thursday decided that it will wait for the police to submit a report on the August 11 DG Halli violence before initiating action against any organisation.
The Karnataka cabinet, led by Chief Minister B S Yediyurappa, will meet on Thursday to discuss a range of issues.
Revenue Minister R Ashoka on Friday said the State Government will recommend to the Centre to ban the SDPI and PFI in Karnataka.
“There are provisions under the law where one is allowed to ban those who indulge in subversive or anti-national activities. We will explore that.
The agency has so far arrested 10 persons in the gold smuggling case.
Nearly 4 million Americans have been infected by the new coronavirus and at least 142,000 have died from COVID-19, the disease it causes, according to Johns Hopkins.
With its other potential candidates still in the earliest stage of testing, Pfizer aims to open a large-scale study this summer but can't yet say which shot is best to include.
Oxford University on Friday said the vaccine it is developing for the coronavirus has entered the second phase of human trials.
More than 100 potential vaccines against SARS CoV 2, the virus that causes COVID-19 are under development, but hopes are pinned on four candidates that seem to be ahead in the race
Alam and Ilyas were sent to a seven-day police remand last Thursday, whereas Danish was sent to a four-day police custody on Monday.