Villagers in Kalachi, northern Kazakhstan, have been suffering from the unexplained condition for about two years. It causes people to fall asleep suddenly, sometimes for several days, and those affected have also complained of memory loss and in some cases hallucinations. More than 100 cases have been reported in the village, which has been nicknamed "Sleepy Hollow", and some people have been affected more than once. Now the heads of neighbouring districts are offering to move the villagers to new homes and jobs elsewhere, the Interfax news agency reports . Priority is being given to the families who have children in the village, the deputy head of Esil district, Saule Agymbayeva, tells the agency. More than half of the village's 582 residents plan to relocate, the report says.