The note was sent to CPM state committee and Chief Minister Pinarayi Vijayan, through party politburo member MA Baby.
A morale-boosting win; Pinarayi makes a historic statement
KK Shailaja is credited for her foresight in preparing the state and her ability to communicate the decisions to the public.
The LDF tally, which matches the win of A K Antony-led UDF in 2001, becomes remarkable as it is rare for an incumbent government to retain power by winning more seats than the last time.
The man, identified as Nandu, was killed in the clash between the RSS and SDPI in Nagamkulangara near Cherthala, Police said.