Detectives were questioning a bus driver today on suspicion of killing a British art student in Poland.
Catherine Zaks, 21, was found bludgeoned to death lying next to a railway embankment in Krakow on Saturday.
She was a second year undergraduate reading history and philosophy of art at the University of Kent.
Today police spokesman Pawel Karnas said the arrested man, named as Miroslaw L, 44, had worked as a bus driver in Krakow for six years.
He said: "I don't know what he has said in interview but he will be interviewed more today. He is the main suspect in the case."
Prosecutors have until tomorrow to decide whether the man will be charged.
Ms Zaks, who had dual British-Polish nationality, was staying with relatives in Krakow while working there for a month.
On Friday she said she was going out to meet someone, but her body was found at 5am the next day by a passer-by.
Grant Pooke, head of history and philosophy of art at the University of Kent, described her as "an exceptionally talented and well-liked student".