The latest search for MH370 — the Malaysia Airlines plane that disappeared four years ago en route from Kuala Lumpur to Beijing with 239 people onboard — has ended in failure, the company behind the search said on Tuesday.

The company, Ocean Infinity of Houston, which scoured the seabed for any sign of wreckage with support from the Malaysian government, announced that the search was winding down with no evidence of the plane’s whereabouts.

“Part of our motivation for renewing the search was to try to provide some answers to those affected,” Oliver Plunkett, Ocean Infinity’s chief executive, said in a statement. “It is therefore with a heavy heart that we end our current search without having achieved that aim.”

He did not rule out a future resumed hunt.

The plane, a Boeing 777 operated by Malaysia Airlines, deviated from its planned route north on March 8, 2014, for reasons that are still unknown. After traveling south over the Indian Ocean, the plane is believed to have flown for about five hours before probably running out of fuel and disappearing.