Investigators have found engine turbine blades of an Asiana Airlines jet that skidded off the runway after a hard landing at Hiroshima Airport last week were severely damaged, possibly because the jetliner approached too low and clipped an instrument landing system antenna array, the Japan Transport Safety Board said Tuesday.

The landing gear of the twin-engine Airbus aircraft operated by the South Korean airline clipped the wireless communication tower off the end of the runway moments before landing. It is possible pieces from that equipment damaged the engines.

The JTSB released photos showing the damaged 6.4-meter-tall ILS antenna array at the airport, as well as parts of the aircraft scattered nearby.