How does Pavel die or get hurt in The Boy in the Striped Pajamas?

In Chapter 13, Bruno mentions that Pavel is looking extremely tired and thin while he serves dinner. Pavel can barely stand upright with his back against the wall as Bruno's family eats. Bruno also notices that Pavel's hands shake while he carries the dinner plates. It is obvious to the reader that Pavel is suffering from malnutrition and lack of medical attention at Auschwitz. Towards the end the meal, Bruno's father asks Pavel to refill his glass, which Pavel typically does without being told. After Pavel fills the Commandant's glass, he turns to refill Lieutenant Kotler's glass, but ends up dropping the bottle of wine. The wine spills all over Kotler's uniform, and Kotler loses his temper. Boyne does not explicitly state what happens to Pavel, but it is suggested that Lieutenant Kotler beats Pavel unmercifully. Bruno begins to cry, and Gretel turns pale after witnessing Pavel's severe beating. Bruno also mentions that his father did not stop Kotler from beating Pavel. Pavel is not mentioned in the novel again after the incident, which suggests that he died due to the extensive injuries he suffered from Lieutenant Kotler's beating.