Hopes are running higher in the search for Malaysia Airlines flight 370. Australian officials say a “fifth” possible signal was picked up deep in the Indian Ocean. The search area is now narrowed to the smallest it’s been since the jetliner vanished.

An Australian air force P-3 Orion, which has been dropping sonar buoys into the water near where four sounds were heard earlier, picked up a “possible signal” that may be from a man-made source, said Angus Houston, who is coordinating the search for Flight 370 off Australia’s west coast. The latest acoustic data would be analyzed, he said. If confirmed, the signal would further narrow the hunt for the Malaysia Airlines Boeing 777, which vanished March 8 while flying from Kuala Lumpur to Beijing with 239 people aboard. The Australian ship Ocean Shield, which is towing a U.S. Navy device to detect signal beacons from a plane’s flight data and cockpit voice recorders, picked up two underwater sounds Tuesday. Two sounds it detected Saturday were determined to be consistent with the pings emitted from the flight recorders, or “black boxes.” The searchers are trying to pinpoint the location of the source of the underwater signals so they can send down a robotic submersible to look for wreckage and the flight recorders from the Malaysian  jet.

The sonar buoys are being dropped by the Australian air force to maximize the sound-detectors operating in the search zone. Royal Australian Navy Commodore Peter Leavy said each buoy is dangling a hydrophone listening device about 300 meters (1,000 feet) below the surface and transmits its data via radio back to a search plane. The underwater search zone is currently a 1,300-square-kilometer (500-square-mile) patch of the ocean floor about the size of the city of Los Angeles and narrowing the area as much as possible is crucial before the submersible is sent to create a sonar map of a potential debris field on the seabed. CCTV’s Andy Saputra reports from Perth with details.

New Possible MH370 Signal Detected

Hopes are running higher in the search for Malaysia Airlines flight 370. Australian officials say a "fifth" possible signal was picked up deep in the Indian Ocean. The search area is now narrowed to the smallest it's been since the jetliner vanished. Andy Saputra reports from Perth.

CCTV’s Mike Walter interviews Van Gurley, Senior Manager at Metron Scientific Solutions on the latest finds in the search for missing Malaysian airlines jet.

Hunt for MH370 Intensifies After New Sounds Detected

CCTV's Mike Walter interviews Van Gurley, Senior Manager at Metron Scientific Solutions on the latest finds in the search for missing Malaysian airlines jet.