However, on 23 August 2007, a Russian archaeologist announced the discovery of two burned, partial skeletons at a bonfire site near Yekaterinburg that appeared to match the site described in Yurovsky's memoirs. The archaeologists said the bones were from a boy who was roughly between the ages of ten and thirteen years at the time of his death and of a young woman who was roughly between the ages of eighteen and twenty-three years old. Maria was nineteen years, one month old at the time of the assassinations while her sister Anastasia was seventeen years, one month old and her brother Alexei was less than a month shy of his fourteenth birthday. Maria's elder sisters Olga and Tatiana were twenty-two and twenty-one years old at the time of the assassinations. Along with the remains of the two bodies, archaeologists found "shards of a container of sulfuric acid, nails, metal strips from a wooden box, and bullets of various caliber". The bones were found using metal detectors and metal rods as probes.