Islamic State fighters have been reportedly battling other rebels with chemical weapons, which has been drawing fears among Syrian families.
Medicins Sans Frontieres (MSF), a medical charity in Syria, said in a report that following the consecutive clash between the Islamic State fighters and the rebels, it has treated one Syrian family affected by being exposed to chemicals, inhaled from the area near the fighters' battle ground.
Reports say that a 3-year old girl and 5-day old baby girl, were brought for treatment at the MSF in Aleppo province, northern Syria on Friday. They were delivered at the hospital an hour later after the attack, with breathing difficulties, burned skin, red eyes and conjunctivitis.
Hospital staffs first treated them with oxygen and they were later moved to another hospital as they need more specialized treatment.
Pablo Marco, MSF's program manager said in a statement, "It it was a chemical attack, it is impossible for us to ascertain who was responsible."
"MSF has no laboratory evidence to confirm the cause of these symptoms," Marco added. "However, the patients' clinical symptoms, the way these symptoms changed over time, and the patients's testimony about the circumstances of the poisoning all point to exposure to a chemical agent."
Civil rights activist, Abdulrahman al-Tayyib said "More than 50 shells fired by ISIS hit the town of Marea on Friday. Most of the shells contained sulfur mustard, which caused serious casualties among civilians."
Earlier reports related to ISIS using poison gas attacks had been thrown against Kurdish-controlled areas in northern Syria last June.
A US general released a statement on Friday, confirming that the fragments gathered from the fired mortars at Kurdish fighters in Iraq earlier in August tested positive after being examined in a US military field analysis.
General Kevin Killea, a Marine Corps Brigadier and chief of staff for operations against ISIS, said that further tests should be done to conclude a proof of chemical weapons used by the group.