YEREVAN (Reuters) - Armenia has declared martial law and total military mobilization following clashes with Azerbaijan over the Nagorno-Karabakh region, Armenian Prime Minister Nikol Pashinyan said on Sunday. Tensions rose between Armenia and Azerbaijan on Sunday morning over clashes in which Yerevan said Azeri forces shelled the region of Nagorno-Karabakh and Baku accused Armenian forces of shelling Azeri military and civilian positions.