Defense ministry spokesman Vagif Dargahli on Thursday accused of Armenian forces of shelling Azerbaijani villages along the front line with heavy-caliber weapons and said the fighting is getting worse.

Nagorno-Karabakh, a separatist region of Azerbaijan, which has been under the control of Armenia's military and local ethnic Armenians since an all-out war ended in 1994.

Military officials in Nagorno-Karabakh on Wednesday accused Azerbaijani forces of using a tank against their positions for the first time since the cease-fire in 1994.

Asked about the possible use of tanks, Dargahli said Azerbaijani forces are using "different caliber weapons, depending on the situation."