Katie Gee and Kristen Trup, both 18, were walking in the Zanzibar capital of Stone Town in their last week of a trip as volunteer teachers, when two men on a moped threw acid at them. They suffered severe burns to their hands, chests and faces. The girls, both members of the Federation for Zionist Youth, arrived in the UK Friday, accompanied by their families, and were admitted to a London hospital after receiving first aid care at a hospital in Dar es-Salaam. Zanzibar police have offered a reward of 10m Tanzanian shillings ($6,170) for information leading to the capture of the attackers. Earlier this year, two Christian leaders were killed on the predominantly Muslim island province and in November a cleric was treated in hospital after an acid attack.