The Azerbaijan Defense Ministry said the Armenian-backed force launched three ballistic missiles in the area of the fighting, but they did not explode.

"Armenia uses Tochka-U tactical missiles at the junction in the Nagorno-Karabakh area. Due to the instability and low quality of the enemy's weaponry, the three missiles are not fired," said the ministry representative.

Azerbaijan also announced that its army then attacked a headquarters of the Armenian forces in the village of Agdere, in the Nagorno-Karabakh region.

The pro-Armenian separatist forces in Nagorno-Karabakh later denied the news of firing the Tochka-U missile in the contiguous area.

On the same day, the Armenian Ministry of Defense announced the destruction of 11 tanks, 9 armored vehicles, a TOS-1 thermo-jet artillery complex, some BM-27 Uragan and BM-30 Smerch complexes of Azerbaijan.

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The fighting between Azerbaijan and Armenia around the separatist area of Nagorno-Karabakh lasted for the fourth day, the two countries both claimed to cause heavy damage to the enemy.

Russian President Vladimir Putin and his French counterpart Emmanuel Macron called on Armenia and Azerbaijan to "complete ceasefire" in Nagorno-Karabakh and be ready to step up diplomatic efforts to resolve the conflict.

However, Armenia and Azerbaijan ignore international cease-fire calls, sparking fears that conflict could escalate into full-scale war and intervening by regional powers like Turkey or Russia.

Location area Nagorno-Karabakh.

Nagorno-Karabakh is a province of Azerbaijan, but the majority of the local population is Armenian, which is a minority and always tries to secede from Azerbaijan to annex with Armenia.

The dispute over control of the Nagorno-Karabakh region broke out into a six-year war between Azerbaijan and Armenia from February 1988 to May 1994.