(NEXSTAR) – An underwater exploration company has regretfully announced that an image they previously believed to show Amelia Earhart’s lost plane was actually just a big rock.

“After 11 months the waiting has finally ended and unfortunately our target was not Amelia's Electra 10E (just a natural rock formation),” the company, Deep Sea Vision, wrote on its Instagram account earlier this month.

Earlier this year, the company had thought they may have solved the 90-year mystery into Earhart’s disappearance in late January, after capturing a sonar image of an underwater object that they estimated to be the same size and shape of her Lockheed Electra E-10 aircraft, and in the location where it is believed to have gone down.