The bodies of 34 Ethiopian Christians executed in Libya by Islamic State (IS) in 2015 have been exhumed from a mass grave, Libyan authorities said on Monday, Reuters reported.

The grave was unearthed on Sunday, after information was obtained during investigations of arrested IS members, the interior ministry’s Criminal Investigation Department (CID) said on its Facebook page.

The bodies will be repatriated to Ethiopia once “domestic and interntional legal procedures are completed”, it said. Hundreds of thousands of people have migrated from sub-Saharan Africa to Libya in recent years, many hoping to eventually reach Europe.