"This means the control of Aleppo [city], and the countryside and securing all of Aleppo", Abdul-Rahman said.
Syrian troops have made significant advances against the last rebel held enclaves in the country's northwest, state media said on Sunday, consolidating the government's hold over the key Aleppo province.
Lowcock said "the crisis in northwest Syria has reached a horrifying level", calling the violence "indiscriminate" and stressing that "the only option is a cease-fire".
Rescuers and a medical aid worker said airstrikes on Darat Izza, a town still in opposition hands in northwestern Aleppo, knocked two health facilities out of service.
Syrian rebels were driven out of the provincial capital's eastern quarters in late 2016, which they had controlled for years while battling government forces in charge of the western section.
Witnesses also reported air strikes in southern areas of Idlib province.
Some western media outlets have estimated that Turkey has sent about 9000 servicemen to Syria's Idlib.
It has also upset the fragile cooperation between Ankara and Moscow, which back opposing factions in the conflict.
"We told (Russia on Saturday) ... that the aggression in Idlib must stop and that a lasting ceasefire has to be achieved now", Cavusoglu told reporters in Germany after the Munich Security Conference.
Army spokesman General Ali Mayhoub said in a televised speech that Syrian troops were continuing their ground advances to "eradicate what is left of terrorist groups" in Syria, congratulating the soldiers for the swift advances in "record time". "They have a full understanding of each other", said Lavrov. In a statement, he said the United Nations believes 900,000 people have been displaced since December 1, a lot of them women and children.
A total of 23 villages to the west and north of the city were liberated, as fighters from the Hayat Tahrir al-Sham group (formerly known as Jabhat al-Nusra) fled from their positions, state broadcaster SANA reported.
According to al-Watan, a newspaper close to the Assad government, civilians are expected to be able to use the recently seized sections of the highway by the end of the week.
The Syrian army had also opened the global roadway from northern Aleppo to the towns of Zahraa and Nubl towards the Turkish border, a military news service run by Lebanon's Assad-allied pro-Damascus Hezbollah group said.
Turkey, which supports rebels who want to remove Assad from power, has urged Russian Federation to stop the attacks in the Idlib region, warning it would use military might to drive away Syrian forces unless they withdraw by the end of the month.
Turkey, which backs the opposition, has called for an end to the Syrian government offensive.
Turkey has so far sent thousands of troops and hundreds of convoys of military equipment to reinforce its observation posts in Idlib, established under a 2018 de-escalation agreement with Russian Federation.