A preliminary analysis of this data suggested that distinctions hadn't been made between the US-backed, so-called 'moderate rebels' and Jabhat Fateh al-Sham (Nusra Front) terrorists yet.
"Russian officers have contacted representatives of Pentagon and the US special services in Geneva. We are examinating the data related to the areas of operation of US-controlled armed groups, which we've received today," Zorin told journalists.
"But a preliminary analysis revealed that these the distinctions between the group and terrorists hadn't been made," he added.
"He [Lavrov] noted that the list of groups who signed an agreement with the United States on adhering to the ceasefire provided by the US side contains a series of blatantly terrorist formations cooperating closely with Nusra Front," the ministry said in a statement.
Russian Foreign Minister Sergei Lavrov and US State Secretary John Kerry spoke on the phone earlier in the day.