The FBI wants to know who left two explosive devices outside cellphone stores in northern Michigan this week, with threatening notes attached.

According to the FBI, two explosive devices were discovered outside cellphone stores in Cheboygan and Sault Ste. Marie on Thursday. Law enforcement officers and bomb technicians from the Michigan State Police and the FBI responded to the locations and rendered the devices safe. 

But what they found has raised cause for concern, as the FBI suspects this is part of a broader criminal plot.

According to the FBI, both devices were contained inside Postal Service Priority Mail boxes, sealed with black duct tape and placed outside the cellphone stores. There were threatening notes addressed to Verizon and AT&T on the top of each box, though the FBI has not explained what the "threatening" notes contained.

The notes were signed either “HJ” or “Handcuff Johnny.”

The letters “CMT” were written on each box, which authorities believe stand for Coalition for Moral Telecommunications, a group that has been linked to a series of mystery letters that turned up in the Upper Peninsula  last month.

To read the original post and see updates to this story, follow this link to the Detroit Fress Press website.  https://www.freep.com/story/news/local/michigan/2021/09/17/bomb-cheboygan-sault-ste-marie-verizon-at...