ALBERT LEA, MN (CBS/KIMT) -- Tuesday, the Freeborn County Sheriff's office continued the investigation into the explosion that happened in the basement of a house located at 18115 Pelican Road in Albert Lea, Minnesota.
The blast, which occurred just after midnight on Oct. 21, seriously injured the property owner who was identified as 48-year-old Ronald Rofshus.
Rofshus was transported by ambulance and later taken to Hennepin County Medical Center. The blast occurred when Rofshus was mixing components to make an explosive device.
Tuesday, a detective with the Freeborn County Sheriff's Office was allowed access into the residence and observed several items that he believed were components for making explosive devices. Contact was then made with the Bloomington, MN Police Department's Bomb Squad who responded to the residence. The Bomb Squad also contacted the FBI to assist in the investigation.
When members of the Bomb Squad did a walk-thru of the residence, they found firearms and firearm components that they considered beyond their area of expertise and requested assistance from the Bureau of Alcohol, Tobacco and Firearms.
Throughout the afternoon and evening, bomb squad technicians, with the aid of a remotely controlled robot, removed several containers of components used to make explosive devices and detonated those on site outside of the house. Additional explosive components were removed from the residence and detonated at a remote site.
The incident remains under investigation. No decisions have been made regarding criminal charges.