More than 90 Somali men and women were held shackled on an airplane for nearly 48 hours – and some were forced to urinate where they sat – during a failed attempt to deport them from the US, according to a lawsuit filed late on Monday.

Seven passengers representing the 92 people onboard alleged they suffered “inhumane conditions and egregious abuse” on the 7 December flight, which was due to land in Mogadishu, Somalia, but only reached Dakar, Senegal, where it was held for 23 hours before returning to the US.