A New York City firefighter lost his life on Thursday night, after battling a five-alarm fire that broke out on a film set in upper Manhattan. The New York City Fire Department identified the firefighter as Michael Davidson, 37, who had 15 years of experience with the department. He was a father of four children. Officials say the fire began at around 11 p.m. in the basement of a five-story building where "Motherless Brooklyn" was being filmed. The crime drama stars Bruce Willis and Edward Norton. Norton is also the director of the film. "Our city lost a hero tonight," New York City Mayor Bill de Blasio said in a tweet, adding: "The prayers of 8.5 million New Yorkers are with his wife, his four children and his loved ones."