He called relatives of slain former Congress state Nand Kumar Patel, Mahendra Karma and Uday Mudliyar.
Rahul also tried to reach out to the family of V C Shukla but his daughter was in the US.
On this day last year, Maoists carried out one of their most high-profile attacks in the Jeeram Ghati region of Bastar, killing 27 and wiping out almost the entire state Congress leadership in the state.