PERTH, Australia (AP) -- Australia's prime minister says officials have narrowed the search zone for the missing Malaysian jetliner. And he says they are "very confident" that the underwater signals they have heard are from the plane's black box recorders.
But Tony Abbott says those electronic signals are fading.
He spoke during a visit to China, where he briefed President Xi Jinping on the search for Flight 370, which vanished five weeks ago on a flight from Malaysia to Beijing.
Search crews are racing against time because the batteries powering the recorders' locator beacons last only about a month. It will be hard to find the devices after the batteries fail, because the water in the area is 15,000 feet deep.
Abbott told the Chinese leader that the next steps in the search will be a "very long, slow and painstaking process."
(Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)
Viewers with disabilities can get assistance accessing this station's FCC Public Inspection File by contacting the station with the information listed below. Questions or concerns relating to the accessibility of the FCC's online public file system should be directed to the FCC at 888-225-5322, 888-835-5322 (TTY), or email@example.com.