An aerial drone crashed on Tuesday morning in the northwestern Iranian province of Ardebil, Iran's official news agency IRNA reported.
The Armenian Unified Infocenter reported the aircraft was an Israeli-manufactured IAI Harop kamikaze drone that crossed from Azerbaijan to Iranian territory and was shot down by Iranian forces or crashed in Ardebil, not far from fighting between Armenian and Azerbaijani forces in the Nagorno-Karabakh region.
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The IAI Harop is a loitering munition developed by Israel Aerospace Industries and is designed to target enemy air defense systems.
IRNA noted that Iran has repeatedly asked for the settlement of the conflict between Azerbaijan and Armenia and urged cessation of hostilities in Nagorno-Karabakh.
The dispute over Nagorno-Karabakh started in 1988 and led to a hot war in 1992.
Half of Nagorno's population, 75,000 people, has been displaced due to Turkish-backed Azerbaijan attacks.
The United States on Tuesday urged both sides to adhere to a Russia-brokered ceasefire reached over the weekend.
After more than 10 hours of marathon talks in Moscow, foreign ministers from Armenia and Azerbaijan signed a ceasefire deal that took effect Saturday. Russia has a security pact with Armenia, but it also has cultivated warm ties with Azerbaijan, allowing it to play mediator.
But immediately after the deal took effect, both Armenia and Azerbaijan have accused each other of breaching it with continued attacks.
On Tuesday, Azerbaijani officials said Armenian forces shelled some of its regions, and Nagorno-Karabakh officials said Azerbaijan launched "large-scale military operations" along the front line. Each party customarily denies the other side's claims.
IRNA said that since the clashes started, more than 50 rockets have hit the border areas of Eastern Azerbaijan.
US Secretary of State Mike Pompeo tweeted that both countries must "implement their commitments" to a ceasefire and stop targeting civilian areas.
Turkey, which has taken a highly visible role during the current hostilities to support its ally Azerbaijan, has criticized other nations for failing to demand the withdrawal of Armenian forces from Nagorno-Karabakh.
"We have said countless times that the only solution to this problem is for Armenia to withdraw from Azerbaijani territory," Turkish Foreign Minister Mevlut Cavusoglu said after talks with his Swedish counterpart, Ann Linde, who urged an immediate ceasefire.
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