COLUMBUS, Ohio (AP) -- A special hotline for anonymous telephone tips about record tampering in Columbus schools has filled up quickly.

Ohio Auditor Dave Yost's office says capacity has been increased since the line opened Thursday. It was initially set up to hold 20 calls and got 19 calls the first night.

Yost has been investigating schools including the Columbus district for allegedly manipulating attendance and enrollment records to improve academic results. The Columbus Dispatch reports ( http://bit.ly/P05IgS ) that Yost believed employees needed an anonymous line because of pressure not to discuss any wrongdoing.

The district says the superintendent had asked for the auditor's help, and sent out a memo to district employees informing them of the confidential hotline.