More than 20 air strikes targeted two mountains and three villages in the Jabal al Zawiya region and two other villages in the countryside of the Hama province, a war monitor and a civil defence group said.
The toll of nine dead could rise as some people were seriously injured in the raids, the Syrian Observatory for Human Rights reported.
The Syrian Observatory for Human Rights said opposition forces attacked regime positions in the south of Idlib, killing at least 51 combatants on both sides, as Russian-backed regime forces have been making gains in the last opposition stronghold.
55 people were left injured by the blast in Syria's northeastern town of Hasakah.
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