The home minister, however, refused to divulge further details, saying the Special Investigation Team (SIT) was gathering evidence.
"We have got clues, but we cannot tell things to the media for now because we should have correct evidence for the clues we have got," he said.
"If there is no proper evidence when we file thecharge sheet in the court, it won't stand. So we are trying to collect the evidence properly. We know who has done it (the killing) and what.... everything we know," Reddy told reporters at Chikkaballapur, 35 kms from here, on Sunday.
The killing had led to national outrage and protests by several groups over "rising intolerance" in the country and attempts to muzzle dissent with the criticism targeted at the Modi government and right wing groups.
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Reddy had on September 9 made similar claims about the SIT having gathered "some clues" in connection with the case.
The Karnataka government, which constituted the SIT headed by IGP (Intelligence) B K Singh, has also announced Rs 10 lakh reward for anyone giving clues about the perpetrators of the crime.
The family had said the investigators should look into all angles in the case, as reports had emerged about a possible naxal hand in the crime other than the suspected involvement of right wing extremists.
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