It used DNA analysis on bones and teeth recovered from mass graves found in the former Yugoslavia.

CNN: War graves experts to help with Katrina IDs

The Belgrade authorities said on June 3rd that investigators were examining scores of bodies from several mass graves at undisclosed places in Serbia.

ECONOMIST: Serbia and Slobodan Milosevic

It may also lead to the opening of hundreds of mass graves so that bodies can be recovered, identified and handed to families for reburial.

ECONOMIST: Reopening graves of the past

Suspicions are that the dig has revealed a "plague pit" -- one of many mass graves used to dispose of the bodies of those who succumbed to the Black Death, or bubonic plague, in the 14th century.

CNN: London rail excavation unearths suspected 'plague pit'

In the late 1700s, mass graves in the Les Halles district, such as those in the now closed Saints Innocents Cemetery, were overcrowded with improperly disposed of bodies , creating unsanitary conditions that led to the spread of disease.

BBC: Exploring the history of catacombs

Many people across the region will mark the anniversary with prayers, a moment of silence, sprinkling water on mass graves in Indonesia and offering food to monks in Thailand, among other memorials as people in the region try to move forward.

CNN: STORY HIGHLIGHTS