Plane’s black box signal about to expire

A US navy “black box” detector made its debut in the hunt for flight MH370 but Australia’s search chief warned it was crunch time as the box’s signal is set to expire soon.

Malaysian opposition leader Anwar Ibrahim said he believed the country’s regime was concealing information on the crisis, saying “the government knows more than us”.

The Australian naval vessel Ocean Shield arrived with a “towed pinger locator” capable of homing in on signals from the black box, as 14 planes scoured the remote Indian Ocean search area for signs of a crash site.