Abu Marwan had participated in several battles in Hama province in recent weeks, leading Ajnad al-Sham's militants alongside Jund al-Aqsa.
He was also responsible for training scores of recruits and suicide-bombers at the group's training camps.
Killing of the notorious terrorist commander came after the Syrian Army and its allies started wide-scale and special military operation to recapture the lost lands in the Northern parts of Hama province.
According to a battlefield source, in the first hours of the operations, the pro-government forces hit the defense lines of the militant groups, advancing against Takfiri terrorists in the region.
The Syrian army soldiers inflicted major casualties on terrorist groups in three regions in Northern Hama on Wednesday.
The Syrian military forces repelled terrorists' attacks on government positions in three villages of al-Thafi, al-Zuqbi and al-Talisia, killing and injuring most of the combatants.
Meantime, the army men stormed terrorists' concentration centers in the villages of Atshan, Tal Skeik and Um Hartin in Northern Hama, in which four tanks, four armored vehicles, six vehicles equipped with machineguns and a 130 mm cannon of the militants were destroyed.
Earlier report said that Syrian military forces engaged in fierce clashes with three different terrorist groups along key roads in two strategic regions in Northern Hama, inflicting major casualties on them.
Army soldiers struck the positions of terrorist groups along the road connecting Ma'an to Kawkab and al-Kabbaryieh, killing 18 terrorists, including 11 from al-Murabitin group, 5 from Jund al-Aqsa and 2 others from Abna al-Sham Movement.
The militants' weapons and ammunition were also damaged in large parts in the clashes with the army, FNA reported.
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