Mr Peskov claimed that Ukraine has not responded to a draft document that includes a proposal to set up three working groups.
Peskov said that Poland had not contacted Moscow directly about the incident.
The proliferation of nuclear weapons in Europe will not add security to the European continent, Kremlin spokesman Dmitry Peskov said on Wednesday.
Russia and the United States have so far bypassed European countries in negotiations over a possible end to the war in Ukraine.
The payments apply to full-time students enrolled in “general, professional or higher education institutions” who are registered at a maternity hospital.
Mr Peskov said Moscow views its strong relationship with Iran as highly significant and aims to strengthen cooperation across all areas.
The two leaders are expected to discuss prospects for further expanding bilateral cooperation.
Russia did not explicitly take responsibility for the crash amid speculation that its air defence system downed the plane.
The espionage trial of Evan Gershkovich, the Wall Street Journal reporter jailed in Russia, enters its final phase on Friday as the court begins hearing closing arguments.
Moscow says it has enough experience to mitigate the impact of such restrictions.
