Arrest made after explosive devices found in Sault and Cheboygan Mich.

The Federal Bureau of Investigation (FBI) and Michigan State Police have made an arrest in relation to explosive devices that were found outside of cellphone stores in Sault Michigan and Cheboygan Sept. 16. 

An individual was arrested Tuesday evening, according to an FBI release. 

The explosive devices were inside USPS Priority Mail boxes with threatening notes addressed to Verizon and AT&T. 

The letters made specific demands to the telecommunications companies.

Law enforcement officers and bomb technicians from the Michigan State Police and the FBI removed the explosive devices from both scenes. 

The FBI is crediting the joint effort of police departments of law enforcement agencies in making an arrest. 

“An investigation this fast-moving cannot be successful without good partnerships,” reads a release issued by the FBI Wednesday. “The tireless efforts and seamless coordination amongst all the investigative agencies were critical to quickly identifying and arresting the subject, disrupting the threat this individual posed to the public.”

The investigation is ongoing.