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: Meet These Two Bear Cubs Who Have Become Inseparable At The Detroit Zoo

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

READ MORE: Delta Wants Other Airlines To Share ‘No-Fly’ Lists To Help Stop Unruly Passengers

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 This material may not be published, broadcast, rewritten, or redistributed.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: Veteran Needs Help With Home Repairs