Rebel fighters in Syria are developing their own hand-made weapons as they battle the government regime . Fighters from the Suqour al-Sham Brigade are setting up weapons factories in caves to make shells and rockets as they take on the might of President Bashar Al-Assad 's regime . These pictures show men developing mortar shells from gas canisters and making their own rockets using welding materials . Shell : A man works on a mortar shell inside a cave used as a weapon factory operated by rebel fighters from Suqour al-Sham Brigade . Basic : The men use basic welding tools to prepare their mortar shells and other weaponry . Welder : The Suqour al-Sham Brigade are understood to have approximately 400 fighters in their ranks . The Suqour al-Sham Brigade were established in 2011 and are believed to be a mix of military defectors and civilian volunteers . They are understood to have approximately 400 fighters in their ranks , and are aligned with the Free Syria Army . The brigade are based in the Idlib Province in north-west Syria , which has come under sustained attack from the government 's forces during the long-running civil war . Last week , Syrian activists and the Western-backed opposition accused the government of carrying out a devastating chlorine gas attack against a rebel-held town in Idlib that killed at least six people and left dozens , including children , choking and gasping for breath . The reported use of poison gas on the town of Sarmin was the first alleged chemical attack since the U.N. Security Council approved a resolution that condemns the use of toxic chemicals such as chlorine in Syria . But a Syrian military official in Damascus denied any government role in the attack and blamed it on rebels , adding : 'The army did not and will never use any internationally-prohibited weapon . ' Prepared : The rebels are seen here preparing a range of devices to fire at President Bashar Al-Assad 's . Simple : Gas canisters are converted into basic shells and loaded to be fired by mortars . Fighters : The Suqour al-Sham Brigade are believed to be a mix of military defectors and civilian volunteers . Bombs : A man inspects gas canister devices that have been prepared to fired against government forces . Secure : The rebel fighters have built their weapons factories deep inside caves in the Idlib Province . Yesterday , two car bombs killed at least 25 people and wounded another 80 celebrating the new year festival of Nowruz in the mainly Kurdish city of Hassaka in northeastern Syria , according to state media . The Syrian Observatory for Human Rights group , which tracks the four-year-old Syrian civil war , said 33 people , including children , were killed in the attack which it said was carried out by Islamic State .
Suqour al-Sham Brigade Brigade manufacture their own weapons in caves . Rebel fighters have set up factories to fight government regime . Pictures show men preparing shells and mortars in basic conditions . More than 200,000 estimated dead in last four years of civil war .