Security has been stepped up in and around the Jail of Tihar prison where underworld don Chhota Rajan was lodged yesterday after being remanded to a 14 day judicial custody. Rajan has been kept in high-security Tihar jail as CBI decided to take over all the 71 cases registered by Maharashtra Police against him. <br/><br/>The ITBP and CRPF, which take care of the security outside the prison, have increased their surveillance to ensure that nothing is smuggled to him in the jail premises.