06:06 GMT - Emotional scenes - Tom Hancock in Beijing reports emotional scenes at the Lido Hotel, where relatives continue to arrive from across China, hugging their loved ones, with some crying. Malaysia has launched a terror probe and is investigating four people as it emerges at least two passengers boarded using stolen European passports. Vietnamese boats reached the scene of two large oil slicks detected overnight but found no sign of the plane, while the search area has been expanded to 10,000 square kilometres (3,900 square miles.) However, Azharuddin Abdul Rahman of Malaysia's Department of Civil Aviation says he cannot "confirm" the existence of the oil slicks.
KUALA LUMPUR, Malaysia (AP) — Malaysia's air force chief says that military radar indicated the missing Boeing 777 jet may have turned back, but declined to give further details on how far the plane may have veered off course.