SYDNEY (AP) — Thursday marked a bleak moment for Malaysia Airlines Flight 370. For the first time since it disappeared March 8 with 239 people on board, no one is looking for it.

An unmanned sub that spent weeks scouring the area of the Indian Ocean where searchers had detected acoustic signals they hoped were from the aircraft finished its work Wednesday, after finding nothing. Australian officials leading the search acknowledged that the area can be ruled out as the aircraft’s final resting place.