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- On December 20, Russia reported that Idlib militants violated the ceasefire regime in Greater Idlib 6 times: 3 – in Aleppo province, 3 – in Latakia;
- On December 20, SAA artillery shelled HTS positions near Kansafra;
- On December 20, SAA artillery shelled HTS positions near Fatirah;
- On December 20, SAA artillery shelled HTS positions near al-Barah;
- On December 20, Russian warplanes attacked ISIS hideouts in the Resafa desert.
