Having doused the fire and investigated the damage, Dumbledore moved towards the auror, "Miss Tonks, did you find anything of the perpetrators?" The auror sighed, "Sadly, no, all we know is 3 masked Death eaters entered the alley, vandalized few stores and hexed few people and left. Although, few moments later another entered, and used a dark curse to burn the alley. A few speculate that it could be Bellatrix, although they say it was a garbled voice and nothing, but a silver mask was visible."