Video and flight tracker data appears to point toward a United Arab Emirates C-17, not a U.S. plane, as the aircraft behind a wayward humanitarian aid drop in Gaza Friday that reportedly killed several civilians on the ground. Pentagon officials denied early reports that a U.S. plane was responsible for the deaths, and noted that the Air Force has not used C-17s to make drops in Gaza. U.S. officials also would not confirm deaths on the ground beneath any aid drops, but did not dispute the reports.

Though media reports have cited parachute “malfunctions” as causing injuries and deaths among the waiting crowd, the use of a high-speed parachute intended for combat in the drop may also have been a factor. Video of the drop appears to show that a C-17 used so-called “high velocity” parachutes for the ill-fated drop, which may have made the bundles fall into waiting crowds far faster and more dangerously than other drops this week that used larger, slower parachutes.

A video posted online early Friday by journalist Ismail Alghoul captures a C-17 dropping more than 20 bundles over a building and an adjacent open field under what appear to be Low Cost High Velocity, or LCHV, parachutes. An LCHV parachute is made of 12 panels that open in a narrow cone compared to the wide canopies of larger cargo parachutes. One bundle plummets unchecked onto a building while three others scream earthward nearby, open but nearly in freefall. But even the majority of parachutes that appear to work properly fall much faster than a typical cargo, personnel or aid bundle would under a traditional parachute.