CONCORD, N.H. — A New Hampshire lawmaker who claimed the Boston Marathon bombings were part of a government plot and argued that a victim who lost both his legs was not in pain has resigned because she is moving out of her district.

“Certainly this announcement comes as a sigh of relief from both parties. However, this action is due to ‘Divine Providence’ that has presented my family with an opportunity to leave the district in which I now reside,” Republican Rep. Stella Tremblay of Auburn said in a resignation letter dated Monday and released Thursday.

Shortly after the attacks in April, Tremblay wrote in a Facebook comment that the bombings were carried out by a “black ops” mission of the federal government. In a radio interview, she later said that Jeff Bauman, who was photographed being wheeled from the scene and later had both legs amputated, was not in pain.

“It seemed surreal to me. … He was not in shock. He was not in pain. If I had had those types of injuries, I would be screaming in agony,” she said.

In her resignation letter, Tremblay said she has unsuccessfully tried to contact Bauman several times “to have a sincere discussion.” She said she continues to pray for his recovery, and that of the other victims, and in their honor, continues to demand a full investigation.

“It is wholesome and healthy to think outside the box and ask pertinent questions, especially when it involves our liberties,” she wrote.

Tremblay, who was in her second two-year term in the House, apologized for her comments in May. The House, without naming her, later unanimously passed a resolution to show support for the heroes and victims of the bombing and to disavow “unfounded speculation or accusation.”

Jennifer Horn, chairwoman of the state Republican Party, said she had made it clear to Tremblay that she was unfit for public office and not welcome in the GOP.

“We are glad to see her go,” Horn said Thursday.

Democratic Party spokesman Harrell Kirstein called Tremblay an embarrassment to her constituents and the entire state and said her resignation was long past due.