Underwater Pings Unrelated to Missing Flight 370

Yet another set back in the search for the missing Malaysia Airlines Flight 370. U.S. Navy officials say underwater pings heard in the Indian Ocean did not come from the missing plane.

The pings were heard back in April following the flights disappearance on March 8th. The plane had 239 people onboard when it vanished going from Kuala Lumpur to Beijing.

An under-water robot, Bluefin 21, was sent to search more than 300 miles of ocean floor and has come up empty-handed.

The Navy says the pings likely came from a man made source unrelated to the missing plane.

But, searchers have a new lead. A noise has been detected by under-water microphones that could have been the plane crashing.

In August, private companies will take over the search.