Story highlights A doctor in Kobani expresses gratitude for airdropped medical supplies

A U.S. official says that of 28 bundles dropped, one went outside a target zone

A video shows what appears to be an ISIS fighter next to a bundle

CNN cannot independently confirm whether that bundle is from a U.S. airdrop

Turkish-Syrian border (CNN) In the besieged Syrian city of Kobani, precious medicine rains from the sky.

Antibiotics, anesthetics, sanitary supplies and bandages -- all desperately needed to treat local fighters and civilians wounded during the siege of this crucial town near the Turkish border.

U.S. airplanes are dropping medical supplies and weapons into this Kurdish city as defenders try to beat back the Islamic State in Iraq and Syria , or ISIS.

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Not long ago, Kobani's fall to ISIS seemed certain. But foreign airstrikes and airdropped supplies could help turn the tide.

"We thank the people who brought these medical supplies," said Dr. Walat Omar, who has been braving enemy artillery for weeks to treat the wounded at a makeshift clinic.

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