Asiana Airlines Vice President Akiyoshi Yamamura apologized Thursday to passengers and their families over Tuesdays's botched landing at Hiroshima Airport.

"I apologize from the bottom of my heart to the passengers, their family members and those involved," Yamamura told reporters gathered at the airport.

One investigator said Wednesday that a downdraft may have caused the wheels of the airplane to clip a communications array moments before landing and running off the runway, injuring more than 20 passengers.