An "exceptional" student and college president at the University of Oxford has been found dead in his bedroom.
Andrew Mason had been a student at Balliol College
Detectives described the death of third-year student Andrew Mason, 20, who was found on Monday morning, as "unexplained but not suspicious".
College authorities said they were shocked at the physics and philosophy student's death and said he had been a popular president at Balliol College.
An inquest into the death has been opened and adjourned.
Balliol master, Andrew Graham, said: "He had a very positive attitude to Balliol and to life more generally.
"He was thoughtful, energetic, and down-to-earth to an unusual degree."
Mr Mason was a member of the college choir and the rowing team.
Paramedics were called to Mr Mason's room just after 0915 GMT on Monday but he was pronounced dead at the scene.
A University of Oxford spokeswoman said: "Andrew was managing to combine the heavy demands of his position with exceptionally good academic work."