Some modern historians -- including Zlatarski and Cankova - Petkova -- say that he established a Bulgar state in Macedonia which existed in parallel with Khan Asparukh 's Bulgarian Empire .
There is no more information of Kuber 's life .
Some modern historians -- including Zlatarski and Cankova - Petkova -- say that Kuber established a Bulgar state in Macedonia which existed in parallel with Khan Asparukh 's Bulgarian Empire .
There is no more information of Kuber 's life .