On November 20, 1935, after killing a Palestine police officer, al-Qassam was surrounded by British police in a cave near Jenin and killed in a gunbattle along with three of his fighters.
O 20 de novembro de 1935, logo de matar a un oficial da Forza de Policía de Palestina, al-Qassam foi rodeado pola policía británica nunha cova preto de Jenin e morto nun tiroteo xunto con tres dos seus compañeiros.