Summary
At least 20 ISIS fighters were killed Thursday in a wave of strikes by Syrian and Russian warplanes targeting extremist positions in the city of Palmyra, a monitor said.
The Syrian army and its Russian ally are reportedly preparing to launch a major operation to retake Palmyra.
Images distributed by the Observatory, which relies on a broad network on the ground, purported to show residential areas of Palmyra in ruins after months of air strikes.
An unprecedented truce in Syria, which came into force on Feb. 27, does not apply to ISIS or the Al-Qaeda-affiliated Nusra Front.
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