The NTSB confirmed a UPS cargo plane's left engine separated during takeoff before a fatal Louisville airport crash that killed 12 people and injured 11 others Tuesday.

The grim task of finding victims from the firestorm that followed the crash of a UPS cargo plane in Louisville, Kentucky, has entered a third day.

Surveillance footage showed the left engine of the UPS cargo plane that crashed on Tuesday in Kentucky, detached from the wing, an official said.

Prior to the landing attempt, "One of the tail rotor pitch links was disconnected from a tail rotor blade," the report found. The tail rotor gearbox separated and partially fell out of the sky during the landing attempt, causing the helicopter to spin out of control. The NTSB is continuing to investigate the crash.

Investigators said several explosions occurred after the plane crashed as it hit businesses that contained hazardous material. The last time a UPS plane crashed was in August 2013. An Airbus A300 crashed on an early-morning approach into Birmingham, Ala., killing the two pilots.

A 29-year-old man was killed in a crash on Route 1 in Norwood Wednesday that closed the road for several hours, officials said. The man’s name was not released pending notification of his next of kin, Norfolk District Attorney Michael Morrissey’s office said in a statement.

Investigators believe a Ford Focus with five teenage boys inside was stopped on U.S. 385, waiting to turn left, when a 21-year-old woman driving a Jeep crashed into the back, state patrol said.