Marshal Heinrich Botel gathered men from Kulm, Elbing, and Balga for an expeditionary attack deeper into Prussia. They traveled into the lands of Natangians and pillaged the region. On their way back they were in turn attacked by an army of Natangians. The Knights retreated to the nearby village of Krücken south of Kreuzburg (now Kamenka south of Slavskoye), where Prussians hesitated to attack. The Prussian army was growing as fresh troops arrived from more distant territories, and the Knights did not have enough supplies to withstand a siege. Therefore the Teutonic Knights bargained for surrender: the marshal and three other knights were to remain as hostages while the others were to lay down their weapons.

The Natangians broke the agreement and massacred 54 knights and a number of their followers. Some knights were executed in religious ceremonies or tortured to death. Severed head of Johann, vice-komtur of Balga, was mockingly displayed on a spear. Others were ransomed or exchanged, including Marshal Botel. Such barbarity gave the Knights an excuse not to treat the Prussians as civilized and honorable people. Never again did the Knights surrender to pagans. The Natangians did not exploit their victory and did not make offensive moves into the lands of the Teutonic Knights. It took two years for the crusading military order to recover and avenge the massacre.