The martyrdom of Fr. Ambrosio and his companions occurred on the banks of the Uruaqu River, on 3 October 1645. Terrorized by the bloodshed that had occurred during a previous event, the Catholics of Natal took refuge in several places, but in vain. The Dutch authorities forced them to go to a pre-arranged site where they were awaited by soldiers and a group of 200 Indios. Many of the faithful were tortured with their priest in various ways until they died. The chroniclers of the time describe the means of torture: their limbs were severed, their heads cut off; they were burned, their eyes, tongues and noses were torn off. A child was pinned to a tree trunk and another sliced in half with a sword. Mateus Moreira had his heart ripped out through his back, as he cried: "Praised be the Blessed Sacrament". Those martyred include 27 Brazilians, one Portuguese, one Spaniard and one Frenchman.