The ceasefire is reported to come in force at 12 p.m. local time on Saturday (09:00 GMT), the SANA news agency reported.
According to the report, the Syrian forces reserve the right to respond to any violation of the ceasefire regime in Eastern Ghouta.
Earlier in the day, the Russian Ministry of Defense said that the agreements on functioning of Eastern Ghouta de-escalation zone in Syria were signed.
On July 7, Lavrov announced that experts from Russia, the United States and Jordan agreed on a memorandum on the establishment of a de-escalation zone in Syria's southwestern provinces following the first face-to-face meeting between Russian President Vladimir Putin and his US counterpart Donald Trump. The ceasefire came into force on July 9.
Russia, Iran and Turkey are guarantors of the Syrian ceasefire regime. The countries signed a memorandum on the establishment of four safe zones in Syria, which came into force on May 6. The four zones span the northwestern Idlib province and parts of the neighboring Latakia, Hama and Aleppo, the north of the central Homs province, Eastern Ghouta near Damascus, as well as southern Daraa and Quneitra regions.
