Smoke rises and explosions ring out as Syrian army and fighters from Hayat Tahrir al-Sham (HTS) and allied factions trade fire on the outskirts of Idlib's Saraqeb, seen from Ariha, in the worst fighting in the country's northwest in years. HTS, led by Al-Qaeda's former Syria branch, controls swathes of much of the northwest Idlib area and slivers of neighbouring Aleppo, Hama and Latakia provinces. IMAGES