Bengaluru, June 23 -- The raids by Karnataka's anti-corruption body was likely compromised from within as the investigators probing an extortion racket run by a dismissed police constable are examining whether raid information was deliberately leaked ahead of time, said officials familiar with the matter.

The widening investigation comes in the wake of the arrest of Ningappa Savant, a 45-year-old former constable, who allegedly posed as senior Lokayukta officials to extort crores from government officers across departments, including transport, excise and the BBMP. The case initially emerged in May when a call was made to a Tumakuru RTO officer demanding bribes to avoid a Lokayukta raid.

According to an official, the Lokayukta is probin...