The Deputy Foreign Minister of Serbia and Montenegro, Predrag Boskovic, said on Monday that the deadline was expiring at the end of this week.
He said that the Serbian representatives on the council had been giving assurances to their Montenegrin colleagues that Belgrade was cooperating with the tribunal as best it could and that certain positive steps forward had been taken.
"Without handing over all those indicted to the Hague tribunal, this issue will not be settled and will always be like a sword hanging over Serbia and Montenegro in the process of their integration with the European Union," Boskovic told MINA agency.
Podgorica's response came after Florence Hartmann, spokeswoman for the tribunal's chief prosecutor, said that the tribunal could not view Montenegro separately from Serbia with regard to cooperation with the tribunal.
"No one in Serbia and Montenegro, not even the Montenegrin government, can say that they have done everything. There will always be some new demands, and it is not ruled out that some of the fugitives may hide in Montenegro," Hartmann told the Podgorica daily Republika.
She said that the office of the prosecutor was not fully satisfied with the scope of present cooperation.
"The authorities have been assuring us that they are fully cooperating, but it has not been so. From time to time we received information about some fugitives staying in or passing through Montenegro. The Montenegrin authorities, however, always denied it," Hartmann said.