The four accused, who were arrested in the corporate espionage case, were Monday remanded to judicial custody till March 6 by a Delhi court where they alleged that they were forced to sign on blank papers by the police during their custodial interrogation.

The four accused -- Lalta Prasad, Rakesh Kumar, Prayas Jain and Shantanu Saikia -- were produced before Metropolitan Magistrate Dheeraj Mittal after expiry of their police custody.

The Crime Branch of Delhi Police said they be remanded to 11 days judicial custody as they were not required for further interrogation at this stage.