The British man who was the sole survivor of last week's Air India plane crash has helped lay his brother to rest at a funeral in western India. Vishwashkumar Ramesh's brother Ajay was also on the ill-fated flight but did not survive the tragedy.

Investigators in India are studying the black boxes of a Boeing 787 Dreamliner after recovering them from the aircraft wreckage to ascertain the cause of last week's plane crash that left at least 270 people dead.

The black boxes will provide cockpit conversations and data related to the plane's engine and control settings to investigators and help them in determining the cause of the crash.