BOSTON (AP) — Ferry service between mainland Massachusetts and the islands of Martha’s Vineyard and Nantucket continues to be affected Thursday by a ransomware cyberattack, officials said.

The Woods Hole, Martha’s Vineyard and Nantucket Steamship Authority first reported the attack Wednesday.

Scheduled trips were running as normal Thursday, but there may be some delays in the ticketing process, the authority said on its Twitter account. Passengers are also being urged to pay in cash as there is limited access to credit card systems.

Customers remain unable to book or change reservations online or by phone, but the Authority has set up a new website to allow passengers to check schedules.

The cyberattack remains under investigation by local, state and federal authorities including the FBI.

“At this point, we are unable to release or confirm specific details of what occurred,” the authority tweeted.

The attack has not affected the safety of any vessels.