Tvrtko I of Bosnia
In a letter from the Florentine senate (written by Coluccio Salutati) to the King Tvrtko I of Bosnia, dated 20 October 1389, Murad I's (and Jakub Bey's) killing was described. A party of twelve Serbian lords slashed their way through the Ottoman lines defending Murad I. One of them, allegedly Miloš Obilić, had managed to get through to the Sultan's tent and kill him with sword stabs to the throat and belly.