(CNN/KYTX) - Investigators got new information that may help them narrow the possible whereabouts of Malaysia Airlines Flight 370 as details emerged Thursday that shed light on the doomed flight's final moments early March 8 as it flew from Kuala Lumpur toward Beijing.
A search plane has detected a possible signal from the locator beacons on the so-called black boxes from the missing aircraft, the Australian agency coordinating the search announced.
"The acoustic data will require further analysis overnight but shows potential of being from a man-made source," said retired Air Chief Marshal Angus Houston, the agency's chief coordinator.
The possible signal heard by a search plane was picked up through sonar buoys equipped to receive such electronic data and was detected near the Australian ship Ocean Shield, said the Joint Agency Coordination Centre.
Crews have been narrowing the search area in the Indian Ocean.
Up to 10 military aircraft, four civil aircraft and 13 ships were to assist in Thursday's search for the Boeing 777-200ER, which was carrying 239 people when it vanished March 8 on a fight from Kuala Lumpur, Malaysia, to Beijing.