A 21-year-old Bank of America Merrill Lynch intern in London died after working until 6 a.m. for three consecutive days, according to a report in The Independent.

Moritz Erhardt, of Germany, was approaching the end of a seven-week internship when his roommates discovered him dead in his dorm at the Claredale House students’ complex in East London.

According to reports, Erhardt was epileptic and the precise cause of his death has not yet been determined.