Kurdish affairs analyst Mutlu Civiroglu spoke to one of four remaining doctors inside Kobani, who told him all victims were civilians.

“Several patients came to health center at 11:10pm with burn in the throat & as well as complaining about headache, though their situation is NOT very severe," Dr. Ahmed reportedly told Civiroglu. "We are NOT sure what the cause is yet, but we are planning to send affected patients to Suruc [neighboring city in the Turkish side of the border] in the morning for further examination.”

Reports of a similar chemical attack surfaced last week in Kobani, when several Kurdish fighters’ bodies appeared to show signs of blistering.

“Burns and white spots on the bodies of the dead indicated the use of chemicals, which led to death without any visible wounds or external bleeding,” Kurdish health minister Nisan Ahmed told Middle East Review of International Affairs journal.

There have been rumors that ISIS militants have obtained chemical weapons. Given that Kobani is on the Syrian border with Turkey, the weapons could have come from an undisclosed Syrian stockpile that used to belong to the Damascus regime