The seven-year-old DMK-Congress alliance is in trouble over the issue of seat-sharing for the Assembly polls. Party chief M Karunanidhi said the party's high level committee would take a "proper decision" on the issue on Saturday.
In a statement, he asked whether it was proper for Congress, which had agreed for 60 seats earlier, to now demand 63 seats over telephone.
The Congress stand that it would decide on the constituencies to be contested was highly improper, he said in a statement.
The DMK and the Congress have held three rounds of discussions on seat-sharing for the April 13 Assembly elections, but no headway could be made due to differences between the two parties.
Speculation was rife that the deal would be signed on Friday.