Iranian President Hassan Rouhani warns that the current fighting between Armenia and Azerbaijan could spread beyond its borders and turn into a regional war.

President Rouhani expressed his concern about the conflict at a meeting with his cabinet ministers on Wednesday.

Hundreds of civilians and soldiers have been killed in their 10th day of fighting between Armenia and Azerbaijan over the disputed territory of Nagorno-Karabakh. Iran shares its northwestern border with Armenia and Azerbaijan and has good diplomatic relations with both nations.

Iranian news reports said that stray mortar shells landed in Iranian border villages and towns, leaving buildings damaged and a six-year-old child injured.

Rouhani also warned that Tehran would not tolerate any nation sending "terrorists" to Iran's borders under any pretext whatsoever.

Turkey has been accused of sending Syrian fighters to the region in support of Azerbaijan, its long-standing ally — an accusation that Ankara denies.

Nagorno-Karabakh, a predominantly ethnic Armenian territory within Azerbaijan, declared its independence from Baku in 1991 during the collapse of the Soviet Union, sparking a war that claimed the lives of as many as 30,000 people before the ceasefire was declared in 1994, leaving it under the control of ethnic Armenians.

Peace efforts in the Nagorno-Karabakh conflict, mediated by the Minsk Group of the Organization for Security and Cooperation in Europe, consisting of the United States, France, and Russia, collapsed in 2010.