WASHINGTON – NPR, PBS and local public broadcast stations around the country are hiring more journalists and pumping millions of dollars into investigative news to make up for what they see as a lack of deep-digging coverage by their for-profit counterparts.

In the past three years, the Corporation for Public Broadcasting has invested more than $90 million in federal funds on new journalism initiatives. That includes a $10 million local journalism initiative that is paying for the creation of five regional centers that will help local PBS and NPR stations cover news that affects wider geographic areas. Also, a $6 million grant from the group expanded the PBS investigative series “Frontline.”

Meanwhile, NPR has started an investigative reporting unit supported by philanthropic funds — including $3.2 million donated in the last year.

The prospect of tax dollars going toward their journalistic efforts has drawn criticism.