The nature and origin of a rocket or missile launch observed in Iran on September 18th remain under investigation, with details emerging over the past several days. The event, which occurred on the afternoon of September 18th, has prompted analysis and speculation regarding its purpose and trajectory. Details about the launch were shared by analyst Fabian Hinz via a social media thread on September 21st, highlighting what is known and unknown about the incident. Hinz's analysis suggests the observed trajectory could indicate a test of a medium-range ballistic missile or an anti-ballistic missile system. The exact location of the launch site within Iran has not been officially confirmed, nor has the specific type of projectile involved. This development comes amid ongoing regional tensions and follows reports from a week prior regarding the expansion of tunnel networks by PJAK, an Iranian branch of the PKK, in the Sulaimaniyah region of Iraq near the Iranian border. While no direct link has been established between the tunnel expansion and the September 18th launch, the context of regional military activities is noted. Further information is expected as investigations continue.