Police detained a 31-year-old man who stored drugs on the site of his planned single-family house in Poland. Officers arrested him after finding cannabis plants and illegal substances on the construction area, where he allegedly kept them instead of securing them elsewhere. In total, police seized 41 bushy cannabis plants of the kind other than fibre cannabis, 693 grams of marijuana, and 232 grams of mephedrone. A second person was also arrested, the man’s 30-year-old brother, who was found with 218 grams of marijuana. The case was handled by Poland Police, who secured the substances during their operation and detained both men. The investigation proceeds based on what police uncovered at the building site and the amounts found on each suspect.