On Saturday, June 4, 1960, four Finnish teenagers had decided to camp along the shore of Lake Bodom (Finnish: Bodominjärvi, Swedish: Bodom träsk), near the city of Espoo's Oittaa Manor. Maila Irmeli Björklund and Anja Tuulikki Mäki were fifteen years old at the time; accompanying them were their eighteen-year-old boyfriends, Seppo Antero Boisman and Nils Wilhelm Gustafsson.[3][4][5]