A New Hampshire man working in Haverhill for a tree removal company died Monday afternoon after a branch he was working on snapped, pinning him to the ground, the Essex County district attorney’s office said. The 32-year-old man, who was not identified, was working on a tree on North Avenue around 1 p.m., according to Carrie Kimball-Monahan, spokeswoman for District Attorney Jonathan W. Blodgett. “He was attached or tied up in a branch,” she said. “The branch gave way, causing him to fall to the ground.” The man was taken to Lawrence General Hospital where he was pronounced dead, she said. “It’s pending autopsy results, but it appears to be an accidental death,” Kimball-Monahan said.