Australian Prime Minister Tony Abbott during his visit to RAAF Base Pearce near Perth last month. Pic AP.

PERTH, Australia (AP) — Australia’s prime minister says searchers hunting for the missing Malaysian jetliner are confident underwater signals that have been picked up are coming from the jet’s black box.

Tony Abbott told reporters while on an official visit to China that Australian authorities are confident they know the location of the black box from the plane that disappeared without a trace on March 8 during a flight from Kuala Lumpur, Malaysia, to Beijing.

The plane’s black boxes, or flight data and cockpit voice recorders, could help solve the mystery of why Flight 370 veered so far off course.