German police have arrested a 41-year-old man on suspicion of cannibalism after they found human bones stripped completely of flesh in a Berlin suburb. The suspect was arrested on Wednesday in connection with the September disappearance of a 44-year-old man in the German capital. Police did not name the suspect, but the Bild daily identified him as Stefan R., a high school maths and chemistry teacher. Officers combing the suspect's home found a sack truck and a medical bone saw in his cellar, along with 25 kilogrammes of sodium hydroxide, "a caustic soda suitable for dissolving human tissue," an investigator told Bild. A large fridge was also found in the cellar but it was empty, Bild said. Traces of blood were also uncovered at the suspect's flat, prosecutor Martin Steltner told AFP.