“We will decide on how our air forces should act, depending on the situation,” Lavrov said in a media conference following talks with his Finnish counterpart. “This will not be a surprise for the Americans.”

Al-Nusra Front, an al Qaeda offshoot in Syria, went on an offensive in Aleppo last week. The Russian military blamed the US for stalling Russian airstrikes against the terrorist group’s forces in the region. The US said moderate rebel groups mingled with the terrorists in some areas and that Russia should use caution and not strike those groups by mistake.

“We believe there was plenty of time for the ‘normal’ opposition to leave Nusra Front territories since February. Those who didn’t part ways with the terrorists have only themselves to blame,” Lavrov added.

Moscow hopes that the US is not trying to do anything behind Russia’s back, Lavrov said.

“We expect our partners to cooperate with us honestly and not try to use our regular contacts to secretly go with a Plan B, C or D behind our back.”

Russia and the US jointly support a peace process in Syria that aims to produce a transition government approved by both the so-called “moderate rebel” groups and the government of Syria. A truce between all sides who claim to share this goal was established in February, reducing the violence in the war-torn country; RT reported.

218