A second memorial service was held for a New York City firefighter who died in the South Tower of the World Trade Center when it was attacked 18 years ago.

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Friends, family and firefighters gathered at a memorial service for Michael Haub In Franklin Square, New York, WNBC reported. Haub, 34, was a 13-year veteran of Ladder Company 4, according to the Uniformed Firefighters Association said in a statement. Haub was survived by his wife, Erika, and their son and daughter, who were 3 years old and 16 months old when he died, according to The Washington Post. Haub had been on the job for two years when he was killed, WNBC reported.

Haub's remains were verified by the New York City medical examiner's office Thursday, CNN reported. They were first found in lobby debris of the south tower six months after the attacks by two airplanes, according to WNBC.

According to the medical examiner's office, the remains of 60% percent of the 2,753 people killed at Ground Zero on Sept. 11 have been positively identified, CNN reported.

Haub's service was held at the same location as his March 2002 wake, The Washington Post reported.

Gerald Fitzgerald, president of the Uniformed Firefighters Association, called Haub a "hero," WNBC reported.

"Nearly 18 years to the day after terrorists took his life, Firefighter Haub will be remembered by his loved ones and fellow firefighters," Fitzgerald said in a statement.