New Delhi, Aug. 7: The probe into an alleged assault on a Jawaharlal Nehru University student by Central Industrial Security Force personnel at Delhi's Rajiv Chowk Metro station continues to be in limbo although a week and a half have passed since.

On July 27, Aman Sinha was detained by the CISF following an altercation with two constables who had objected to him wearing earphones while going through the security check.

Sinha has claimed that he was thrashed in a passage leading to the security control room - away from the area covered by CCTV cameras - and the constables even used communal slurs after he told them his first name, which is the Urdu word for peace. The 21-year-old history student was also made to write an apology for "hot talk" by an official at the Metro station.

Metro rules forbid passengers from using their mobiles while entering the platform. While most passengers are let off with a warning, Aman says a CISF guard at the metal detector gate yelled at him and asked him to go to the end of the queue. When he returned to the security check, he said, he had removed his earphones but was reprimanded by the guard again.

The CISF had immediately instituted an inquiry under deputy commandant P.G. Abhilash Kumar, which was to have been completed in "two to three days". When Sinha did not receive any call to join the probe, he filed a complaint at Rajouri Garden metro police station on July 31. The police are yet to file an FIR.

CISF deputy inspector-general Raghubir Lal confirmed that Sinha was yet to be interviewed and Kumar's report was pending. "Now that the police are looking into the case, our inquiry is secondary. From the CCTV footage and other information gathered so far, we don't think he was beaten up. We have not received his complaint nor have we been asked to join the police investigation. If we are called, the two constables involved will cooperate," Lal told The Telegraph.

Dinesh Kumar, station house officer, Rajouri Garden metro police station under whose jurisdiction Rajiv Chowk falls, said he had just returned from leave and would examine the complaint.

Sinha now plans to move the National Human Rights Commission. "The day after the incident, a person who introduced himself as a CISF officer had called me up and apologised. I had faith in the system, but even when I went to the police they only accepted my complaint after pleading with them for half an hour," he said.

"In the meantime, I have seen hate propaganda against me on Right-wing websites saying JNU students deserve this. The NHRC seems to be the only option left for justice."