Mystery surrounds German soldiers found near mud-covered WWII motorcycle in Danube

The discovery was announced by the German War Graves Commission, an organization that works to locate, recover and identify German war dead, in August.

Pictures show the heavily corroded motorcycle caked in mud and rust - with its frame, wheels, fuel tank and storage boxes still largely intact.

"Because the harbor mud is mixed with gas oil, the motorcycle and identification tags are well preserved," the German War Graves Commission said in a statement, adding that the motorcycle model "was considered particularly robust and reliable at the time."

Officials also found the remains of two German soldiers while recovering the motorcycle, along with two well-preserved identification tags.

Both tags were still intact. 

The identification tags found with the remains are still being deciphered, Diane Tempel-Bornett, a spokesperson for the German War Graves Commission, told Fox News Digital in a translated email.

Tempel-Bornett said that despite the discovery of the tags, the identities of the two soldiers remain unknown.

"The fact that the identification tags were found with the dead does not necessarily mean that they belonged to them - although that is quite possible," she said.

The fact that the tags were still intact could indicate the soldiers were never recovered or officially accounted for after their deaths, Tempel-Bornett said.

Tempel-Bornett said identifying the soldiers can be a "long, painstaking process," with even small details offering potential clues.

Researchers then compare those findings with military records and other historical evidence.

"Here, we work closely with the German Federal Archives in Berlin," she added.

"Only when everything fits together is the person's fate considered to have been clarified."

The final stage, Tempel-Bornett said, is to reach out to any relatives of the deceased.

For now, the identities of the two soldiers - and how they and the motorcycle came to rest in the Danube - are an ongoing mystery.

"We can only speculate [on the cause of death]," added Tempel-Bornett.

"Whether the dead tried to cross the frozen Danube, whether one fell, whether the dead were shot or drowned … we will only know after their fate has been clarified."