Praveen was in judicial custody on charge of a criminal offence registered against him recently, police said.
Praveen was taken to the civil hospital where he was declared brought dead, police said, adding that the body would be handed over to his relatives after the post mortem.
The cause behind the incident could not be ascertained so far, police said.
However, on the complaint of jail authorities a case was registered in Baldev Nagar Police station in the regard, police said.
The matter is being investigated, SHO, Baldev Nagar police station Rajneesh Yadav said.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)