Hyderabad, Jan 19 : Satyam Computer Services former Chairman B. Ramalinga Raju filed a revision petition in Andhra Pradesh High Court today against his police custody.

Ramalinga Raju, his brother Rama Raju and company''s Chief Financial Officer Vadlamani Srinivas are in police custody since Sunday. They were formally taken into police custody for four days and were grilled by Crime Investigation Department (CID) sleuths.

Meanwhile, a Hyderabad court will hear the bail plea of Ramalinga Raju, Rama Raju and Vadlamani Srinivas.

All are in judicial custody till January 23 and have been lodged in the Chanchalguda Central Prison.

Besides, a court will take up a SEBI petition seeking permission to question Ramalinga Raju.

Police stepped up their investigation into the case, having charged Ramalinga Raju and B. Rama Raju with criminal conspiracy and forgery after Raju admitted profits had been falsified for years and quit.

A case has been filed against Raju under Sections 120-B (criminal conspiracy), 406 (criminal breach of trust), 420 (cheating), 468 (forgery for cheating) and 477-a (fraudulent cancellation of securities) of IPC.

Raju had disclosed a financial fraud in the company to the tune of Rs 7,800 crore by inflating profits and showing fictitious assets where none existed.

The company''s scrip has fallen nearly 80 per cent since the revelation was made. (ANI)