AMSTERDAM, June 23 (Reuters) - A Boeing 777 aircraft

operated by Dutch airline KLM was returning to

Amsterdam's Schiphol airport on Sunday shortly after taking off

for Brazil's Rio de Janeiro, national news agency ANP reported,

citing air traffic control.

Flight KLM705 was going to dump fuel over the North sea

after turning around over neighbouring Belgium, ANP said, adding

that it was unclear why the flight was returning.

(Reporting by Anthony Deutsch

Editing by David Goodman

)