A group of bondholders owning the Ukraine's shortest-dated international debt said on Tuesday that the agreement is biased against them and asking for the deal to be changed, Bloomberg has reported.

The group said in a letter sent to other bondholders that the conditions agreed by the Finance Ministry of Ukraine and the Ad Hoc Committee of Creditors foresee that their payments are delayed for more years than everyone else.

While the group may not yet have enough support to block a deal, the letter issued by their solicitors asked for other owners of the securities to join them.

The group is represented by law firm Shearman & Sterling LLP.