In the foyer of the international congress center in Tehran, Rukhani, as host of the meeting, welcomed his guests, Tass reports.
As noted, after the traditional handshake, the leaders took part in the photographing ceremony and went to a specially prepared room for a conversation.
It is expected that the summit will begin with introductory statements of the heads of state for the press, after which the discussion will continue in closed mode.
Earlier, Putin and Erdogan held a meeting in Tehran before the summit on Syria.