 The contemporary sources mainly noted that the battle took place and that both Prince Lazar and the Sultan lost their lives in the battle.The existing evidence of the additional stories and speculations as to how Murad I died were disseminated and recorded in the 15th century and later, decades after the actual event.One Western source states that during first hours of the battle, Murad I was assassinated by Serbian nobleman and knight Miloš Obilić by knife.