By Bria Brown

(CBS DETROIT) – An investigation has been launched after the Walled Lake School District was hit by a cyber attack.

WWJ reports the attack was confirmed by Superintendent Kenneth Gutman in an email to parents Sunday night, but virtual learning was not impacted.

READ MORE: Woman Who Shot At Police Killed By Cop At Juneteenth Event

Gutman said the attackers may have accessed credential information and a team of experts is working on the school’s system.

READ MORE: Fourth Stimulus Check: Is Another Relief Payment Coming?

It could take more than a week until the system is fully restored, according to officials.

© 2020 CBS Broadcasting Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.

MORE NEWS: Michigan Reports 327 New COVID-19 Cases, 35 Deaths