Israeli Defense Minister Moshe Ya'alon said on Monday he was skeptical that a Syria ceasefire announced for February 27 by the United States and Russia will succeed, AFP reports.

He also said that both Washington and Moscow recognize Israeli freedom of action in Syria, where the Jewish state is reported to have carried out a series of raids over the past five years.

"It is difficult for me to see a ceasefire while Daesh (the 'Islamic State' terrorist group) and Al-Nusra Front (the Syrian Al-Qaeda affiliate) are not part of the process and the Russians say they will strike both organisations," a statement said.