Earliest fossil twin burial?

The AP is reporting on the discovery of a double newborn burial near Krems, Austria. The remains are estimated at 27,000 years old, and were buried directly side-by-side along with a string of 31 beads and mammoth bones.

Not much detail in the story, although there is this:

Archaeologists are combing the area to see if the infants' mother is nearby, as giving birth to twins in that era would have been extremely difficult and potentially fatal.

Not to mention for the babies!