The Congress still represents the only credible national alternative to the BJP and it will take its message to the country, hopefully under Gandhi's leadership, Tharoor said.
The CPI(M) symbol is being painted on the party offices in Bankura, Purulia, Coochbihar, Bardhaman, Hooghly, North 24 Parganas and Howrah, and party flags are flying atop the buildings.
Rajeshwar Shastri Musalgaonkar had predicted the BJP's massive victory on April 28, following which, he was suspended from Vikram University.
The development comes as a jolt to the ruling Trinamool Congress and Chief Minister Mamata Banerjee who lost 18 Lok Sabha constituencies to the BJP.
Describing Gandhi as the 'inspiration' for the party, Moily said it was not appropriate for him to quit as the Congress chief.
The police said that no injuries were reported and an enquiry into the matter has been ordered.
Rajinikanth's statement comes on a day when there have been reports that Rahul has stayed adamant on his decision to resign.
The NTK had fielded 19 male and 19 female candidates which made them the only party to give equal representation for men and women.
The Tamil mega-star confirmed that he will be attending Modi's oath-taking ceremony.
He said whatever the high command decides should be binding on all and "position should not be a priority for any leader".
Leading the grand alliance in the state, Congress contested the Lok Sabha polls from seven out of the 14 seats but could win only one.
The Congress chief refused to meet the newly-elected MPs and has cancelled all his meetings and appointments.
This is the first time that the RJD failed to win a single seat in Lok Sabha polls in Bihar, which is regarded as a party bastion.
In the resignation, he took moral responsibility for losing his seat and party's not so outstanding performance in the Congress-ruled state.
Shah said when Modi visited the party workers on the day he filed his nomination papers, it became clear that he was going to win.