The DMK has been given approval by the Lok Sabha secretariat to sit separately from Congress, which joined the TVK-led government in Tamil Nadu, resulting in strained relationship between the long-time allies.
The MK Stalin-led party had sought a change in seating arrangement for its MPs in the Lok Sabha, saying their alliance with the Congress has ended and it would not be appropriate for its members to sit alongside those of the Congress.
A separate sitting arrangement for the DMK is being worked out, according to sources.
DMK leader Kanimozhi Karunanidhi had written to Lok Sabha Speaker Om Birla for changing the seating arrangement in view of the changed political circumstances.
The party on on Thursday evening said that it will not attend the India bloc meeting to be held in New Delhi on June 8.
The Dravidian major said it will not participate in the meeting in order to respect the sentiments of its cadres.
"In view of the sentiments of the DMK cadres who continue to feel deeply hurt by what they consider as betrayal by the Congress party against the DMK, the party will not take part in the India bloc meeting in New Delhi on June 8 in which the Congress participates," a release from the DMK said.
The Congress, which won only five seats in the Tamil Nadu Assembly elections, has gone ahead in extending support to the TVK in government formation, thus putting an end to the alliance with its old ally DMK.
The party has now become part of the TVK government.
The Congress had contested the assembly polls as part of the pre-poll alliance with the DMK.
This has led to acrimony between the two parties with senior DMK leaders calling this action of the Congress "backstabbing" and "betrayal".
The Congress, however, justified its action, saying the DMK had also contested the 2014 election alone.
(With inputs from PTI)
