White House press secretary Jay Carney on Thursday said that nations trying to locate a missing airliner may expand their search area in the Indian Ocean.

A report Thursday said that officials believe Malaysia Airlines Flight MH370, which disappeared early on Saturday morning, may have continued flying for hours after it lost contact with ground controllers and radar.

“An additional search area may be opened in the Indian Ocean,” Carney told reporters.

He said the U.S. was talking to Malaysian authorities and other nations involved in the search on “additional assets to deploy.”

Carney called the search for the 239 people aboard the airliner “frustrating for everyone, but agonizing for the families of those passengers on the flight.”

In the initial days after the disappearance, authorities and search personnel from multiple countries in the region have focused their efforts on an area east of the Malaysian peninsula.

The flight was bound from Kuala Lumpur to Beijing when air traffic control lost contact with the jet approximately an hour after takeoff, according to some reports.

Carney though said that he did not have any new information available to draw conclusions about what might have happened to the flight.

“The investigation is ongoing and is being led by the Malaysian government,” he said. He added that the U.S. was “working closely” on the investigation.

“There are a number of possible scenarios that are being investigated,” Carney continued. “We are not in a position at this time to make a conclusion about what happened.