They've accused the Malaysian authorities of 'deceit' and 'delay'.
The passengers on the triple 7 came from 14 different countries, and two thirds of the passengers on board were Chinese.
Today, some family members turned to action, taking their anger to the streets of Beijing –
Sky's Jonathan Saunders says they protested at the Malaysian embassy and that such protests are extremely rare;
Malaysian authorities are saying they only released the information yesterday out of respect for the families; here's acting transport Minister Hishamuddin Hussein;
While the CEO of Malaysia airlines Ahmad Jauhari Yahya says there's no question they're holding any information back;
Australian authorities, who are leading the search for MH370 in the south Indian Ocean, say the search has been suspended for 24 hours due to bad weather.
Meanwhile – a black box locator is en route from the US – and will arrive in the search area tomorrow;