Malaysia Airlines has asked relatives of passengers on board flight MH370 to leave the hotel accommodation it is providing and return to their homes, BBC News reported.

It is closing the family assistance centres set up after the plane vanished on March 8 with 239 people on board. The airline promised to keep relatives updated on the search operation.

Meanwhile, a report by Malaysia's transport ministry has shown a four-hour gap between MH370's disappearance and the start of a search operation. The report also revealed that air traffic controllers did not realise the plane was missing until 17 minutes after it disappeared off radar.

The plane disappeared over the South China Sea as it flew from Kuala Lumpur to Beijing.

Officials believe it ended its journey in seas west of the Australian city of Perth, thousands of kilometres off course, but do not yet know why. An intensive multinational search has so far turned up no sign of the plane.