Boulder City Fire Department, HAZMAT and Police Department crews have cleared the scene of an explosion and small fire at a commercial building at 14555 S. US-95. The incident started around 9:30 this morning. Six employees were injured; four were treated at the scene, two were transported to area hospitals. Thank you to Henderson Fire Department, Community Ambulance and Las Vegas Metropolitan Police Department for assisting at the scene. OSHA and the Clark County Building Inspector are continuing their investigations at this time.