US consul John Helble suspected that the ARVN troops had used tear gas, and in a report to the US Embassy, Saigon, he noted that "possibly another type of gas which caused skin blisters" was used.
Konsul AS John Helble menduga bahwa pasukan ARVN memakai gas air mata, dan dalam sebuah laporan kepada Kedubes AS, Saigon, ia menyatakan bahwa "kemungkinan jenis gas lainnya yang menyebabkan luka kulit" dipakai.