SEOUL - An Asiana Airlines' cargo plane crashed into the sea off Jeju Island Thursday, killing two people, South Korea's Coast Guard said.

Debris of the Boeing-744 aircraft, which departed from the Incheon International Airport at 3:05 am for China's Pudong of Shanghai, was found in waters about 107 kilometers west of the city of Jeju by a Coast Guard patrol boat at 6:40 am, the Coast Guard was quoted by the Yonhap News Agency as saying.

The Asiana plane with one pilot and one crew member disappeared from radar at 4:09 am while returning to the Jeju International Airport after reporting some mechanical trouble, officials said.

Asiana Airlines is South Korea's second-largest flagship carrier.