Somber developments in the last 24 hours have cast even more mystery over the disappearance of Malaysia Airlines Flight MH370.

U.S. Navy deputy director of ocean engineering Michael Dean on Wednesday told CNN that virtually every country involved in the search for the missing airliner now believes that the pings, first heard last month in the southern Indian Ocean, did not come from the plane’s black boxes but rather from another man-made source unrelated to Flight MH370. The aircraft disappeared March 8 enroute from Kuala Lumpur to Beijing.

As a result, the agency conducting the search said the 850 square kilometer tract they have been combing for seven weeks was not the right area to look any longer.

"The Australian Transport Safety Bureau (ATSB) has advised that the search in the vicinity of the acoustic detections can now be considered complete, and in its professional judgment the area can now be discounted as the final resting place of MH370," according to a statement from the Australia-based Joint Agency Coordination Centre.

Not a single piece of wreckage from Flight MH-370 has been located in the nearly 11 weeks since the plane mysteriously reversed course and disappeared.

"We are still very confident that the resting place of the aircraft is in the southern ocean and along the seventh ping line," Australian Deputy Prime Minister Warren Truss told parliament Thursday. "We concentrated the search in this area because the pings and the information we received was the best information we had available at the time…”