Niagara University canceled all classes Thursday, one day after officials discovered the school was the victim of a ransomware attack.
Spokesman Thomas J. Burns said the university learned late Wednesday that some of the school's email servers were encrypted by ransomware.
"University staff are currently working with a third party vendor to understand the nature and scope of the ransomware attack and to ensure that the servers become fully operational as soon as possible," Burns said in a statement.
The university alerted law enforcement to the attack and school officials are cooperating with the investigation.
The statement did not describe how the ransomware infected the school's computer network nor detail the extent of the damage.
"At this point we have no indication that any personal information has been compromised," Burns wrote.
On Friday, the university was expected to be back in operation.