Boone County, WV – A natural gas explosion at a Boone County apartment building injured three people Friday afternoon, a dispatcher said.

Two people had serious injuries and were transported by helicopter to Cabell Huntington Hospital.

A third apartment resident was treated and released from Boone Memorial Hospital, after sustaining minor injuries, a dispatcher said.

The blast occurred at about 2 p.m. while workers were working on a gas line to one of the apartments at 105 Howell Place, just off Josephine Avenue.

The workers were reportedly installing a gas heater at the time.

The West Virginia Fire Marshall’s office is investigating the blast. Danville and Madison firefighters put out a small fire caused by the explosion, a dispatcher said. Danville and Madison police, along with state troopers and Boone County sheriff deputies, also responded.