The Supreme Court on Friday quashed the Kerala High Court order granting anticipatory bail to four people, including a former Director General of Police (DGP), in a case of alleged frame-up of scientist Nambi Narayanan in the 1994 ISRO espionage matter.

A bench of Justices M R Shah and C T Ravikumar remanded the matter back to the high court and directed it to decide the issue within four weeks.