The “de-escalation zones” to be established in Syria will be closed to military aircraft from the US-led coalition, the Russian official who signed the new agreement said Friday (May 5).

Alexander Lavrentyev spoke a day after he and officials from Turkey and Iran agreed to establish the zones.

"The case is that in the de-escalation zones the work of aviation, especially the coalition forces, is absolutely not envisaged, with or without notification," Kuwait News Agency (KUNA) quoted Lavrentyev as saying.

The only place where the coalition’s aviation can operate is on targets of ISIS, the envoy said, the Kuwaiti agency added.

"The aviation is located in the area of concentration of forces of this group near Raqqa and other settlements, near the Euphrates and Deir ez-Zor," he explained.

"As for their actions in the de-escalation zones, currently all of them are closed for their flights," the head of Russia’s delegation stressed.

The memorandum on “de-escalation zones” does not mention this, but flights are halted above these territories, he said.

“As guarantors, we will thoroughly monitor all actions along this course," Lavrentyev vowed.

Coalition air forces are made up of aircraft from the US, Australia, Netherlands, France, Germany, Jordan, the UK and is due to include Iraq from later this year, Daily mail reported.

US-led coalition began its campaign against ISIS on September 22, 2014. However, hundreds of civilians have been reported killed or injured by the coalition’s airstrikes.

Temporary shelters, including schools with displaced people, in Raqqa and Deir ez-Zor countryside were targeted.

A large part of the two provinces are controlled by ISIS. However, airstrikes carried out on these areas often hit civilians.

In a statement released by the Pentagon on April 30, the US admitted to the killing of more than 352 civilians in both Syria and Iraq since the offensive began in 2014.

However, monitoring group Airwars placed the death toll to be at least 3,000 civilians.