Two men arrested by police under terrorism legislation at the campus of the University of Nottingham last week have been released without charge.
The men, aged 30 and 22, were arrested on 14 May. One was reported to be a student and the other a former student.
Officers described the arrests as a low-key operation in conjunction with the Midlands Counter-terrorism Unit.
Nottinghamshire police said one of the men had been re-arrested under immigration legislation.
University spokesman Jonathan Ray said: "This was a thorough and sensitively handled investigation by the police, which has identified no risks to the campus community or wider public.
"We are grateful to staff and students for their understanding whilst there has been a police and media presence at the University Park campus over the past seven days."
The men were questioned while premises connected to them, including campus property, were searched.
A uniformed presence was in place at the university's main Trent building, which houses the schools of English, modern languages and philosophy as well as management offices.