RavnAir, citing a “malicious cyber attack” on its computer network, canceled at least six flights out of Alaska on Saturday, according to The Associated Press.

Company spokeswoman Debbie Reinwand said the cancellations, which included all flights involving its Dash 8 aircraft, would affect about 260 passengers. The aircraft were grounded until noon “because the cyber attack forced us to disconnect our Dash 8 maintenance system and its back-up,” the carrier said in a statement, according to the AP.

The carrier services numerous parts of Alaska that are not accessible by car. The company said it would run Dash-8 flights on their normal afternoon schedule, according to AP.

“We will be trying to add flights where we can over the next two days,” the company said in a statement Sunday afternoon, according to the AP.  “We have, where possible, re-booked passengers on other flights.”

RavnAir Connect and PenAir flights continued to operate as scheduled on back-up systems, Reinwand said. The airline said it is working with the FBI and other authorities, as well as a cyber-security firm, to restore its systems, according to the AP.