Acting head of OSCE, the foreign Minister and Deputy Prime Minister of Serbia Ivica Dacic tried to convince all parties of the conflict in Ukraine to Express support for the development of 4 sub-groups of the Trilateral contact group, which will deal with security issues, political, economic and humanitarian aspects of the settlement, informs the OSCE. Dacic made the message at the meeting of senior officials of the OSCE dealing with the Ukrainian crisis, which has passed on Wednesday in Belgrade. The meeting was also attended by OSCE Secretary General Lamberto Zannier, head of the Special OSCE monitoring mission to Ukraine, Ambassador Ertugrul Apakan and the Chapter representative to the OSCE Ambassador Heidi Tagliavini. The purpose of the meeting was the planning of further steps of the OSCE regarding the fall in Ukraine, according to a report. "We fully support the efforts of Ambassador Tagliavini. The development of working groups on security, political, economic and humanitarian aspects of the Minsk agreements is currently a priority. I call on all parties to Express support for speedy development of these groups and actively participate in them, is given in the message words of Mr. Dacic. He reiterated that the execution of the Minsk agreements is " the only viable solution to achieve lasting peace ". Apakan reaffirmed the commitment of the SMM monitoring consensus on the stop-fire and withdrawal of heavy weapons, which also require the cooperation of all parties, according to a report. Zannier, for his part, reiterated the requirement to provide an SMM unlimited access and guarantee the security of observers, informs the OSCE.