The strikes hit several positions near Damascus and targeted a research centre and a military airport west of Syria's Homs city, the Syrian Observatory for Human Rights said.
Death tolls creep up in air strikes and clashes over the last four days.
Syrian regime forces have announced the full recapture of Daesh's last stronghold in Syria, the town of Bukamal.
Around 120 Daesh militants and 35 Syrian regime troops died during fighting after in Hama, Britain-based war monitor Syrian Observatory for Human Rights says.
The US-led coalition is preventing the convoy relocating Daesh militants and civilians from reaching its destination.
The Syrian Observatory for Human Rights says at least 25 Daesh militants and six regime soldiers were killed during the regime operation, that was backed by Russian warplanes and helicopters.
Trump administration warns Syrian regime against use of chemical weapons or barrel bombs again.
Fierce battles between Daesh and the Syrian regime forces over the 4,000-year-old UNESCO World Heritage site resulted in the displacement of thousands of people as well as damage to ancient ruins.
The plane reportedly plunged near Turkey's southern Hatay province. No wreckage has yet been found, the governor says.
UN aid trucks to move only after Syrian regime issues letters authorising the deliveries, says United Nations Special Envoy for Syria.
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