The conflict over the Nagorno-Karabakh territory of Azerbaijan has been going on for over 100 years.
On Sunday, both Armenia and Azerbaijan mobilized militarily after clashes in the area.
- It is basically about territory that is formally located inside the Muslim Azerbaijan but where the majority of the population is Christian Armenians.
Armenia wants control of the area and Azerbaijan will not let that happen, says Bert Sundström.
See Bert Sundström explain how serious the conflict is in the clip above