The Midland-based Mackinac Center for Public Policy says it's gotten death threats and bomb threats in the wake of a Freedom of Information Act request filed earlier this month seeking information from labor studies professors' emails, according to a Booth Newspapers report on MLive.

A report from the free market think tank's news service said threatening messages were left on the center's voicemail Thursday and Friday.

In one message, a female voice said, "Scotty Walker is dead. So are you. We know where you live."

Scott Walker is the governor of Wisconsin. The Mackinac Center's FOIA sought emails from professors at the University of Michigan and two other public universities referencing Walker, collective bargaining in Wisconsin, or MSNBC talk show host Rachel Maddow.

The police have been notified, the center said in its report.