A 17-year-old Swedish student was injured when a homemade bomb he was allegedly working on exploded in a hotel kitchen, authorities said.

Police said the student, who was attending school at the Aviation College of Sweden in Vasteras, was "experimenting" Tuesday when an explosion rocked the hotel, which houses students of the upper-level high school, the Swedish news agency TT reported.

TT said the student was hospitalized with serious burns to his arms and that his hearing appeared to be affected by the explosion.