POSTERS displayed at an event promoting student clubs and societies are to be investigated by Queen's University Belfast.
The university is looking into issues relating to the annual Students' Union Freshers' Fair.
Students could face disciplinary measures, the university said.
Posters on two political party stalls attracted complaints.
A Sinn Féin youth wing poster displaying the slogan 'Brits out' was condemned by unionists.
Sinn Féin's Alex Maskey defended Ógra Shinn Féin as showing a "political poster with historical context".
Emma Little-Pengelly of the DUP said it was "offensive and downright unacceptable".
There was also criticism of a DUP poster at the same event that included the phrase "Ulster is British".
It attracted several complaints, with many people on social media pointing out it was also factually incorrect.
Queen's said it was committed to creating and sustaining a harmonious environment "free from language or materials that are likely to be provocative or offensive".
A spokeswoman said this was reflected by the university's equality and diversity policy.
"In line with the university's core values, Queen's expects all of its staff and students treat each other with dignity and respect," she said.
"The university is investigating issues relating to the Students' Union Freshers' Fair and the relevant disciplinary measures will be applied as appropriate following the investigation."
