(CNBC) — A 21-year-old intern who worked grueling hours at Bank of America’s London office died just a week before his internship was to conclude.

Moritz Erhardt, a University of Michigan student from Germany, reportedly had worked until 6 a.m. for three days straight and was found dead in his flat. Erhardt, who suffered from epilepsy, collapsed in his shower, according to reports.

“We are deeply shocked and saddened by the news of Moritz Erhardt’s death,” BofA said in a statement. “He was popular amongst his peers and was a highly diligent intern at our company with a promising future. Our first thoughts are with his family and we send our condolences to them at this difficult time

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