In response, Sharmila's PRJA party tweeted "Thanks a lot Mann sir for supporting our campaign and believing in us. We will change Manipur for good."
The activist went on to form her own party and has decided to fight the March assembly elections with the sole agenda of withdrawal of the Act from Manipur.
Last year, Nongthombam Biren left the Congress, his party since 2007, to join the BJP.
Top Army commanders discussed security and measures being implemented to ensure free and fair elections in the state.
The second and final phase of the Assembly polls is scheduled on March 8 and the results will be declared on March 11.
The 78th ‘King of Manipur’, Ningthou Leishamba Sanajaoba, on Wednesday sat beside BJP president Amit Shah at BJP rally
He claimed that the Centre had sent Manipur 1 lakh crore tonnes of rice under the Food Security Act
The TMC is contesting in 24 seats in the 60-member Assembly the election to which is scheduled to be held on March 4 and March 8.
Rahul Gandhi said, "the Congress will protect the territorial integrity of Manipur".
The bomb was recovered about 6 km from the venue where the Congress vice president is scheduled to address a rally.
The UNC also asked all Nagas in the state to support candidates of NPF which has four members in the outgoing Assembly.
The emergence of the newer parties, political analysts say, is a feeling in the state that neither of the main two political parties has been able to solve deadlocks