Indonesia has been alerted that wreckage from the missing Malaysia Airlines flight MH370 may wash up on the country's coastline.

Floating debris from the aircraft, which disappeared in March with 239 people on board, may have drifted west away from the coastline of Australia and towards Indonesia.

A map of the latest MH370 search area, focusing on a narrow arc in the southern Indian Ocean. Credit:Australian Transport Safety Bureau

The Australian Transport Safety Bureau, which is leading the search for the aircraft off the coast of Perth, said it had issued an alert to Indonesia requesting that authorities be told about any possible debris from the flight.