The policemen were suspended after an internal inquiry, he said.
Eyewitnesses had alleged that the PRV despite being informed at 5:33 AM on May 17 did not reach the spot outside the Meera Bai Marg guest house from where Tiwari's body was found.
The response team, which operates under Uttar Pradesh Police's Dial-100 scheme, reached half-an-hour late, they had claimed.
"The three policemen posted with PRV-467 have been suspended for delayed response in the Anurag Tiwari death incident," Kumar said.
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Though the investigation agency is yet take over the probe, the state police's SIT has already quizzed Tiwari's friend IAS Prabhu Narain Singh and others.
Tiwari, 36, was found dead on May 17, his birthday, under mysterious circumstances near the guest house, where he was staying, in the high-security Hazratganj area here.
His family had alleged that he was murdered at the behest of corrupt officers as he was a whistle-blower and was about to expose a "scam" in the food, civil supplies and consumer affairs department in Bengaluru where he was posted as commissioner.
Tiwari, a 2007-batch officer, was staying at the guest house with a batch mate after attending a mid-career training programme in Mussoorie.