Ramachandran Subas, the accused, who hails from Tamil Nadu, was one of the four persons detained yesterday by the Railway Protection Force immediately after the fire, M Nageswar Rao, ADG, GRP said.
He was loitering near the burning coach of Nandankanan Express.
Subas was produced in a local court today, a knife, a blade and a match box were seized from him.
The three others detained are being interrogated for their possible complicity in the fire in which five bogies of three trains were gutted.