The number of weekly confirmed coronavirus cases at Oxford University has more than tripled, according to its own figures.
In the week to 16 October, 197 people tested positive for Covid-19 compared to 61 in the previous week, which was Freshers Week.
The figure makes up 68% of all 288 cases at the university since August.
The university has not commented on the rise but said there had been a spike of 19 cases at University College.
It comes as pictures and video circulated on social media on Saturday appearing to show hundreds of students congregating at Radcliffe Square in the city.
The university, which hosts about 24,000 students across 39 colleges, previously announced it had asked students to sign a "responsibility agreement".