A Delhi court today remanded Ratan Pal Singh Bhatia, arrested in connection with the bribery case relating to suspended NALCO CMD Abhay Srivastava, in CBI custody till March 5. Bhatia, a representative of Bhatia Group of Industries, who had allegedly paid 20 lakh rupees bribe to the conduit B L Bajaj for delivery to Srivastava, was arrested yesterday.Special CBI judge O P Saini said that the allegations on the face of it are quite serious and are required to be investigated thoroughly. Ratan Pal is the fifth person to be arrested in this case. NALCO CMD A K Srivastana and B L Bajaj are currently in judicial custody till March 3. A K Srivastava's wife Chandani Srivastava, Bajaj and his spouse Anita Bajaj were arrested by the CBI on February 25 following a tip off and allegedly recovered about 10 kgs of gold bricks and jewellery valued at around 2.13 crore rupees as also 30 lakh rupees in cash from their possession.