The building appears to have been almost flattened by the blast Author: Griffin Stockford (NEWS CENTER Maine) Published: 5:11 PM EDT May 14, 2021 Updated: 5:12 PM EDT May 14, 2021 AMHERST, N.H. — An explosion at a home in Amherst, New Hampshire, Friday sent a contractor to the hospital with burn injuries, according to the New Hampshire State Fire Marshal's Office. The home at 13 Clark Ave. was under construction. When firefighters responded just before 9:30 a.m., they found smoke and fire coming from the house, according to the State Fire Marshal's Office. The fire went to a third alarm before being declared under control. There were contractors at the house doing work at the time of the explosion. One of the contractors sustained burned injuries to his arms and is being treated at a Boston area hospital where he is listed as stable condition, according to the State Fire Marshal's Office.