A Delhi court extended the judicial custody of former Telecom Minister A Raja and three others, arrested for their alleged involvement in the 2G spectrum allocation scam, till March 17.

Raja appeared before the court through video conferencing while his former Personal Secretary R K Chandolia, former Telecom Secretary Siddarth Behura and Swan Telecom promoter Shahid Usman Balwa were present in person after the expiry of their judicial custody.

Special CBI Judge O P Saini extended the judicial custody of the trio after hearing their arguments.

"All three accused are remanded to judicial custody till March 17," the judge said after CBI said the investigation into the case was not complete.

The court, after hearing the arguments for Behura, Balwa and Chandolia, held the proceedings for extension of Raja''s judicial custody in Tihar jail separately in the video conferencing room at Patiala House Court.

As the proceedings started, Raja greeted the judge and marked his presence, after which the court extended his remand by two weeks.

Balwa moved an application through his counsel Vijay Aggarwal, submitting that he is required to be examined by specialist doctors for orthopedic and gastric problems.

"He (Balwa) has already been examined at the jail dispensary and he needs to be checked by specialist doctors," Aggarwal said.

He insisted that Balwa should get treatment at any government hospital.

The judge said there is a procedure to be followed in such cases as per which he would have to be examined at the jail dispensary followed by jail hospital and, if needed, he would be treated at a recognised hospital.