Two passenger airplanes of Airbus 320 and Boeing 777 scratched each other when sliding at Beijing Capital Airport Sunday noon. No casualties were caused.

The two planes which belong to China Eastern Airlines and China Southern Airlines respectively were damaged to some degree during the scratch, said sources with the General Administration of Civil Aviation of China.

The source said damage was made to vertical empennage of Airbus 320 and right wing of Boeing 777.

The Airbus plane was scheduled to fly from Beijing to Ningbo and the Boeing 777 was heading for Guangzhou when the scratch happened.

Both flights were delayed and passengers were arranged to take new ones, said the official source.

Reason for the scratch remains unclear and the local civil aviation administration is investigating into the case, said the source.