Manish Kumar, in-charge of the Naugachia government railway police station, was suspended by the superintendent on charges of not cooperating in the investigation.

Bhattacharjee had gone missing July 9 from Naugachia station in Bhagalpur, about 200 km from here.

Police have recovered Bhattacharjee's rucksack and asked forensic experts to examine it.

Bhattacharjee went missing after he chased four youths who had snatched his bag containing his original educational certificates after the train stopped at Naugachia station.

Bhattacharjee, who is from Silchar in Assam, had reportedly told his mother on telephone that he was being tormented by the four on the Awadh-Assam Express.

Bhattacharjee, who held a Master's degree in physics, was going to Delhi to appear for a PhD test.