The move came during the convention of the Eelam People's Revolution Liberation Front (EPRLF), a constituent party of the Tamil National Alliance, in Jaffna.
TNA sources said its leader R Sampanthan told the convention that neither the Tamil people nor the Tamil politicians are demanding a separate Tamil state.
It is the wish of all Tamils that a lasting political solution be given to address the grievances of Tamil people in the north and east.
Therefore the TNA must form a broader National Front with the South-based Sinhala leftist parties and Muslim political parties.
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This would enable the Tamils to see a credible solution to address their grievances.
The EPRLF has a history of working with the Sinhala majority left leaning parties.
They won uncontested the first ever election for the merged north and eastern provincial council - a result of the Indian intervention in Sri Lanka in 1987.