XI'AN - A university student who allegedly stabbed to death a young mother he had injured in a car accident has been arrested, police said.

Yao Jiaxin, a 21-year-old student at the Xi'an Conservatory of Music in Xi'an, capital of Shaanxi province, knocked down cyclist Zhang Miao while driving his Chevrolet Cruze at around 11 pm on Oct 20, when he was rushing to meet his girlfriend.

When he saw Zhang staring at his number plate, Yao is alleged to have taken out a knife and stabbed Zhang eight times until she was dead.