Despite a second attempt at a cease-fire, Armenia and Azerbaijan traded accusations Sunday of violating the new truce in their destructive conflict over the separatist region of Nagorno-Karabakh. The latest truce, which was announced Saturday and took force at midnight, was the second attempt to establish a cease-fire since heavy fighting between Armenian and Azerbaijani forces broke out in Nagorno-Karabakh on Sept 27.

The fighting and shelling has killed hundreds of people " both combatants and civilians " and marks the biggest escalation of a decades-old conflict over the region in more than a quarter-century. The fighting, involving heavy artillery, rockets and drones, has continued despite repeated calls for cessation of hostilities coming from around the globe. It also raises the specter of a wider conflict that could draw in Russia and Turkey and threaten Caspian Sea energy exports.