Censor.NET reports citing BBC.
The strikes reportedly targeted positions in the north-west held by the Army of Conquest rebel alliance.
Russia said it had struck four Islamic State (IS) facilities overnight, and destroyed a "terrorist HQ" outside Idlib and a command post near Hama.
Russia carried out about 20 missions on Wednesday. The US fears they targeted non-IS opponents of Russia's ally, Syrian President Bashar al-Assad.
Thursday's strikes reportedly hit areas near the strategic town of Jisr al-Shughour, as well areas in Idlib province and Hama province further south, according to Lebanon's al-Mayadeen TV.
Rebel activists also reported strikes at Ghantu in Homs province, close to where some of Wednesday's strikes hit.
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