Russia says it is also ready to deploy Russian "military police" forces, where the "de-escalation zones" agreement includes sending "detachments" by the guarantors at the Astana talks.
The revolutionary forces and the Syrian opposition rejected that agreement, demanding that it be under the auspices and supervision of the United Nations, and refused to consider Iran a guarantor.
"Iran is ready to send a peace force there," Qassimi said in response to a reporter's question at a weekly press conference in Tehran that Iran is ready to send a "peace force" there, stressing that the guarantor states continue their consultations on the ceasefire agreement.
At the Astana 4 meetings, Turkey, Russia and Iran agreed on May 4 to establish " de-escalation zones". The agreement came into effect on midnight of May 6.
Under the agreement, units of the three countries are to be deployed to "maintain security" in four specific areas in Syria: Idlib, parts of Aleppo countryside, parts of Hama countryside and parts of the Latakia countryside..