Kurdish fighters have been trying to keep ISIS from taking the Syrian town of Kobani for several weeks, and on Sunday the U.S. announced for the first time it had air-dropped lethal aid to the rebels, Reuters reports. The 27 bundles dropped by three U.S. C-130 transport aircraft contained weapons, ammunition, and medical supplies. “There was an urgent need to resupply,” said a senior Obama administration official. “This was the quickest way to get the job done.” President Obama notified Turkish president Recep Tayyip Erdogan that the U.S. would be conducting drops, though Turkey opposes arming the rebel groups it considers terrorists. While the U.S. says the 135 airstrikes it conducted near the town on the Turkish border have slowed ISIS, it warned that Kobani may still fall.