York College has sent a letter to students about the "incident" at the city campus tonight.
It says all staff and students are safe and "we are cooperating with the police".
The letter confirms that there will be no teaching at the college - daytime or evening - on Thursday (March 16).
However, it adds that the college will be open to allow people to collect personal belongings.
It says timings will be confirmed when the college has "further information from the police".
The letter, seen by The Press, adds: "We are aware that some exams are due to take place for a small number of students tomorrow (Thursday), so we will contact those students individually to make appropriate arrangements."
Tonight, York College gave The Press a statement.
It said: "We are working with the relevant emergency services in connection with the ongoing incident.
"We have decided to remain closed to students tomorrow (Thursday, March 16).
"We expect to be open as usual on Friday, March 17. In the meantime, students and staff are encouraged to regularly monitor their emails."
We are working with the relevant emergency services in connection with the ongoing incident.
— York College & University Centre (@york_college) March 15, 2023
We have decided to remain closed to students tomorrow.
We expect to be open as usual on Friday. In the meantime, students and staff are encouraged to regularly monitor their emails
Police vehicles and other emergency services rushed to the York College area earlier today in response to a serious incident.
The road between the college and the Tesco roundabout was closed and people were told to avoid the area.
More to follow.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here