The Kerala High Court will hear today the anticipatory bail plea filed by former police/ Intelligence Bureau officers RB Sreekumar, PS Jayaprakash, Thampi S Durga Dutt and Vijayan, who are accused of conspiring to frame former Indian Space Research Organisation (ISRO) scientist Nambi Narayanan in an espionage case in 1994 [PS Jayaprakash v Central Bureau of Investigation].