A computer problem that reduced patron services continued for a second day Thursday at the 10 libraries that make up the Butler County Federated Library System.

The unspecified problem meant library patrons couldn't use the public computers or library WiFi or hold books through the library catalog throughout the system's libraries. But people could still check out and return books and other materials.

“We have a spread sheet tracking all the check-ins and checkouts, and we will update the system when it is back on line,” said Peter Bess, assistant director of the Butler Area Public Library, 218 N. McKean St.

A spokeswoman for the Zelienople Area Public Library, 227 S. High St., said the computer problem wasn't expected to affect the library's annual book sale.

The library won't be able to process book sale purchases made with a credit or debit card, but will still accept cash and checks.

The book sale runs through Saturday.

Director Michelle Lesniak at the South Butler Community Library, 240 W. Main St., Saxonburg, said the library was using a scanner system to check items in and out. The library had abbreviated hours Thursday — 10 a.m. to 4 p.m. — but the early closure already had been planned to accommodate the Saxonburg Firemen's Parade.

Butler's Bess said people should check the library Facebook page, butlerareapubliclibrary, or its webpage to see if computer service is restored.

The Slippery Rock Community Library, Prospect Community Library and Chicora Community Library all said they would remain open during regular hours despite the technical issue. A representative for Mars Public Library, which normally closes at 7 p.m., was unsure as of 4:50 p.m. whether the library would close early.