A cyclist who was killed in a collision with a bin lorry was a high-achieving Oxford University student, the university has said.
Tsz Fok was pronounced dead at the scene of the crash
Tsz Fok, who was in his 20s, was pronounced dead at the scene in Oxford city centre on Wednesday morning.
Tsz Fok had seven A levels at grade A, and ten A starred GCSEs. He studied engineering, economics and management at Worcester College.
Police have bailed a 30-year-old man pending further enquiries.
Worcester College's principal, Richard Smethurst, said: "Everyone at Worcester College is shocked and deeply saddened by the death of Tsz Fok.
"Tsz was an extremely popular and talented student who was held in great affection. He will be very much missed.
"Our profound sympathy goes to his family and friends."
Professor Arthur Dexter, who was one of Tsz Fok's tutors, said: "Everybody in the College knew Tsz - he was involved in absolutely everything, always cheerful, always with a smile on his face and everybody was fond of him.
"We can't believe what has happened. He was also exceptionally gifted and on course for a star-studded first in his finals.
"He was a delight to teach, a delight to have around the place and we are all really going to miss him."
While on a gap year, Tsz Fok worked in industry where he developed a procedure that led to his employer saving several thousand pounds a year.