Two British teenagers had acid hurled at them in Tanzania's semi-autonomous Zanzibar region, leaving them with facial, chest and back injuries.
Charity volunteers Kirstie Trup and Katie Gee, both 18, suffered severe burns when they were targeted by two men on a moped on Aug 7, reported UK's The Mirror.
Miss Trup said that passers-by, including a soldier, ignored their pleas for help as they writhed in agony on the roadside after the unprovoked attack. She described the moment as their "flesh being seared".
She recounted how the passenger on the moped smiled before hurling car battery acid at them as they walked to a restaurant.
Miss Trup, who had noticed the men going slowly alongside them, said: "I was about to ask them, 'Is everything OK?'. But before I could utter a word the driver nodded.
The passenger smiled then pulled up a jerry can from his right side, which until that point remained out of view.