Northern Ireland police chief appeals to students over serial rapist Zhenhao Zou

Zou found guilty of raping 10 women in the UK and China, but police fear he may have attacked more than 50 women

Northern Ireland's police chief has appealed to students who may have had concerns about the serial rapist Zhenhao Zou, who studied at Queen's University Belfast for two years.

Jon Boutcher, the chief constable of the Police Service of Northern Ireland, said they had been unable to speak at the trial before Zou's conviction this week amid fears he may have drugged and attacked more than 50 women while in London.