Lews Castle College, along with the rest of the University of the Highlands and Islands partnership, is experiencing "an ongoing cyber incident" which has caused disruption to their systems and networks across all their campuses.
The announcement was made on Twitter and Facebook yesterday evening (Sunday March 8).
The UHI stated: "We are currently working to isolate and minimise impact from this incident with assistance from external partners.
"We do not believe personal data has been affected.
"The source of the incident is not yet known.
"To help us minimise disruption caused by this incident, all college and research institution campuses will be physically closed to all students and staff on Monday 8 March.
"There may be some exceptions - especially for students at NAFC Marine Centre UHI, Moray College UHI, Sabhal Mòr Ostaig UHI, West Highland College UHI, Scottish Association for Marine Science UHI and Lews Castle College UHI - and, therefore, if students are still to attend, someone from the local campus will have let you know.
"All classes currently online because of the restrictions caused by COVID-19 will continue as normal wherever possible."
Later last night Lews Castle College stated: "Our Stornoway campus will remain open for practical classes tomorrow as well as Taigh Chearsabhagh and An Cotan. The Barra and Benbecula centres will be closed.
"Students and staff should check their UHI emails for the latest information, which can also be found at uhi.ac.uk/latestnews