An external fuel tank from an Israeli F-15 Baaz fighter jet was recovered on the Caspian Sea coast near Ramsar in northern Iran, indicating Israeli jets have flown deep into Iranian airspace. Multiple reports and analyses suggest Israeli aircraft and drones have used Azerbaijani airspace as a corridor for attacks on Iranian cities including Tehran, Tabriz, and Karaj during a recent 12-day conflict. Iranian President Masoud Pezeshkian has formally requested Azerbaijani President Ilham Aliyev to investigate and verify allegations of Israeli drone incursions and airstrikes launched from Azerbaijani territory. Azerbaijan has officially denied these claims, with Aliyev stating that his government would not permit its airspace to be used against Iran. Iranian officials, including the ambassador to Armenia, have indicated ongoing investigations and have presented evidence to Baku suggesting Azerbaijani airspace was utilized by Israeli forces. Former Iranian ambassador to Azerbaijan Mohsen Pak Ayeen noted that Israeli drones conducted espionage operations against Iran from Azerbaijan during the Nagorno-Karabakh conflict, with Iran having shot down one drone in response. The situation has heightened political and media tensions between Tehran and Baku, with Azerbaijani authorities rejecting accusations of involvement in Israeli military operations against Iran.