In 1840, the Jews of Damascus were falsely accused of having murdered a Christian monk and his Muslim servant and of having used their blood to bake Passover bread or Matza. A Jewish barber was tortured until he "confessed"; two other Jews who were arrested died under torture, while a third converted to Islam to save his life. Throughout the 1860s, the Jews of Libya were subjected to what Gilbert calls punitive taxation. In 1864, around 500 Jews were killed in Marrakech and Fez in Morocco. In 1869, 18 Jews were killed in Tunis, and an Arab mob looted Jewish homes and stores, and burned synagogues, on Jerba Island. In 1875, 20 Jews were killed by a mob in Demnat, Morocco; elsewhere in Morocco, Jews were attacked and killed in the streets in broad daylight. In 1891, the leading Muslims in Jerusalem asked the Ottoman authorities in Constantinople to prohibit the entry of Jews arriving from Russia. In 1897, synagogues were ransacked and Jews were murdered in Tripolitania.