FDNY firefighter Timothy Klein died in a Brooklyn house fire on Sunday.

The fire at 10826 Avenue N turned deadly when fire swept through the second floor of the structure. The intensity had firefighters leaping from windows and led to a partial structural collapse per fire officials.

Klein became separated from his unit and was fatally injured in the structural collapse per both fire authorities and other on scene sources. Eight other firefighters also were injured.

Timothy Klein

Klein died just three years after delivering the eulogy for fellow firefighter Steven Pollard who also died in the line of duty.

Klein was thirty-one and had been on the job over six years. He is the son of a retired firefighter and was assigned to Ladder 170 in Brooklyn.

FDNY Lt. James McCarthy, president of the FDNY Fire Officers Association said Klein’s “sacrifice embodies the ultimate heroism, laying down his life for others.”

Klein graduated from Archbishop Molloy High School in Queens before attending York College of Pennsylvania, where he received a bachelor’s degree in sports management and athletic administration in 2012.

He was also a second-degree member of the Knights of Columbus.

Per FDNY, Klein is the 1,157th member of the department to die in the Lien of Duty.

The September 11 Foundation mourns the loss of all firefighters and public safety responders risking their lives to protect others.