At least 20 Palestinians were killed on Wednesday at an aid distribution site run by the Gaza Humanitarian Foundation, in what the U.S.-backed group said was a crowd surge instigated by armed agitators.

At least 20 people were killed in a crowd crush at an aid distribution site run by the Gaza Humanitarian Foundation (GHF), the controversial Israeli- and US-backed organization said Wednesday, the first time it has acknowledged deaths at one of its sites.

Twenty Palestinians were killed at a food distribution center run by an Israeli-backed American organization in the Gaza Strip on Wednesday, mostly from being trampled, the group said. They were the first deaths reported at one of the group’s sites,