SYDNEY (AP) — A team of Australian researchers looking into the disappearance of Malaysia Airlines Flight 370 released data on Wednesday about an unusual underwater sound recorded around the time the plane vanished, though the lead scientist acknowledged the chances it is linked to the jet are slim.

The low-frequency sound was picked up by underwater listening devices in the Indian Ocean off the west coast of Australia on March 8, the same day the Boeing 777 disappeared on a flight from Kuala Lumpur, Malaysia, to Beijing with 239 people on board. Researchers at Curtin University in Western Australia have been analyzing the signal to see if it may be the sound of the plane crashing into the ocean.