Bangladesh, Oct. 18 -- 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 there broke out on Sept. 27. The fighting has killed hundreds and marks the biggest escalation of a decades-old conflict over the region in more than a quarter-century.

Armenian military officials on Sunday reported shelling and missile strikes by Azerbaijani forces carried out in the conflict zone overnight. In the morning, "the enemy launched an attack in the southern direction...