A group of ten unknown attackers beat up four men with stakes in Bulgaria`s village of Dalgodeltsi late on Monday. After the victims managed to hide in a nearby shop, the attackers overturned a car, parked on the spot and run away. The men beaten have been taken to a hospital in the town of Montana, one of them with his arm broken. There is no danger of their lives, doctors reported. The investigation on the case is still under way.