Christopher Vourlias Croatia’s Drugi Plan and Bulgaria’s Agitprop, two of the leading production outfits in Southeast Europe, have been attached to co-produce the upcoming drama series “Sabre,” a political thriller revolving around the 2003 assassination of Serbian Prime Minister Zoran Djindjic produced by Belgrade-based This and That Productions.Created by Goran Stanković and Vladimir Tagić, the series will star Serbian-Danish actress Danica Curcic, known to international audiences for her lead role in the Netflix psychological thriller “The Chestnut Man,” as a reporter investigating the shocking murder.The companies announced the deal on Monday at the Sarajevo Film Festival, where This and That’s “Bad Blood” and Drugi Plan’s “The Silence” were among the top Balkan drama series vying for Heart of Sarajevo TV Awards, which were handed out at a ceremony in the Bosnian capital on Sunday night. “Sabre” was first pitched in Sarajevo three years ago during the CineLink Drama co-financing forum, where it was named best drama project.