The exchange of prisoners in the DPR is prepared according to the formula " 12 for 12 ", said Last news in the Ministry of defence DND. "We are prepared to exchange twelve. These are all the Soldiers of the armed forces. In Exchange we are required to give 12 soldiers DND ", - stressed in the Ministry of defence. Where exactly will be the Exchange, until not called. on Wednesday in Minsk concluded the work of 3 sub-working groups of the contact group on Ukraine in the fourth subgroup - security - adjourned. In the past several rounds of negotiations of the contact group and its subgroups, the key issues were the withdrawal of weapons with a calibre of not more than 100 millimeters, the issues of constitutional reform, the special status of Donbass and local elections, as well as the Exchange of prisoners and the rehabilitation of infrastructure.