Several imams, revered by the Muslim population in the state, stressed that minorities should ensure that they exercise their franchise in favour of the "strongest secular candidate".
Simul Soren, president of the ISF, said the party represents the interests of the Dalits, Adivasis and OBCs, irrespective of their religious beliefs.
ISF president Simul Soren will contest from Haripal in Hooghly district, while Mohammed Iqbal and Nuruzzaman will be the party's candidates from Entally and Metiabruz.
The Left also said that the alliance has been formed not with an eye on the elections only, but also for a fight for lives and livelihoods of people and secularism, and against attacks on democracy.
Bengal polls: Congress, ISF break ice over seat-sharing; talks still underway for some constituencies
Newly floated Indian Secular Front (ISF) had initially demanded 15 seats from the Congress, but the party had agreed to give only five to it.
If the ISF can bring 1 to 2% of minority electorates in its fold, the TMC will be in trouble, said a CPI(M) leader.
The state has already been drawn into the vortex with the TMC and the BJP accusing each other of fanning communal sentiments ahead of elections.
Though ISF chief Abbas Siddiqui urged his supporters to fight hard for ensuring the victory of the Left parties in various parts of the state, Siddiqui stayed away from seeking votes for Congress.
Proclaiming support for the Left Front (LS) and its allies in the state, Siddiqui, however, said Bengal will get the better of the BJP and “its B-team Mamata Banerjee” in the election.
Addressing a press conference, Siddiqui said the Left Front has agreed to leave for it 30 seats as part of the Left-Congress-ISF alliance.
Owaisi's influence in Bengal remains limited to the Urdu-speaking upper-caste Muslims. For the rest of Bengal, language will be his first barrier.
A Left Front leader said dialogues are on to settle the deal as they are trying to stich an alliance to defeat TMC and BJP.
Not just the ISF, the RJD and several other smaller secular parties will also be accommodated in the alliance, Chowdhury said.
West Bengal Congress seeks high command nod for dialogue with Indian Secular Front for poll alliance
Senior state Congress leader Abdul Mannan in a letter to party president Sonia Gandhi said he has already started 'unofficial dialogue' with ISF.
Siqqiqui asserts his newly floated political outfit will prove to be the 'Kingmaker' in the state which roughly has 30 per cent Muslim voters.