PORTLAND, Maine (AP) The Maine Public Utilities Commission has approved an extended scope into customer utility accounts as complaints of high electric bills continue to pour in.

The Office of the Public Advocate asked regulators to do an additional examination of Central Maine Power bills from May 2018 to present.

The Portland Press Herald reports a previous audit examined the company’s billing and metering system only through April 2018.

The investigation by an independent auditor was prompted after more than 100,000 customers received inaccurate bills following the roll out of the new billing system in October 2017. The findings showed some customers received monthly invoices for $1,500.

The newspaper says Central Maine Power blamed customers, the weather and energy prices.

Public Advocate Barry Hobbins says he thinks residents deserve answers.