The accident occurred when K.M. Basheer, 35, bureau chief of the "Siraj" newspaper, was returning home on his two-wheeler at around 12.45 a.m. when the car knocked him down in the high security zone area of the state capital. He died on the spot.
The road on which the accident took place is often used by VVIPs, including the Chief Minister and the Governor. But the police said that many of the CCTV cameras in the area were not working.
A witness told the media: "I was overtaken by the speeding car after which it hit the bike. The driver was under the influence of alcohol. A lady was also with him."
Another witness said: "The man who was driving the car was drunk. He was in total panic after the accident and it was me who called the police.
"Soon the police arrived and he called a taxi and sent away the lady who was with him."
It was later found that the IAS officer in question was Sreeram Venkitaraman, accompanied by his lady friend Waha Firoz to whom the car belonged, according to records from the State Motor Authority.
Firoz told the police that the car was driven by Venkitaraman.
Senior journalist Aravind S. Sasi told the media that he reached the accident site soon after hearing the news and was surprised to know that the police, after coming to know that the person involved in the accident was a senior IAS officer, was trying to save him.
"The lady was allowed to go home soon after the accident, while Venkitaraman was not taken for the mandatory blood test and he sought treatment at a private hospital," said Sasi.
The local Museum Police station officials said that Venkitaraman was under the influence of alcohol.
Sanjay Gurudin, Commissioner of Police, said a detailed probe is going on.
"All the forensic examination is going on. The blood sample of the person can be taken only after certain procedures are followed. We are going forward as per the law," said Gurudin.
Former Superintendent of Police George Joseph said there was a foul play.
"The police should have immediately taken them into custody and should have gone for a medical check up. This delay is nothing but a way to save the senior officer," said Joseph.
The Thiruvananthapuram unit of the Kerala Union of Working Journalists has asked Chief Minister Pinarayi Vijayan to see that the police should ensure a proper investigation and justice to the victim.
( With inputs from IANS )