The Islamic State militant group claimed responsibility Wednesday for deadly attacks in Irans capital of Tehran that killed at least 13 people at two of the countrys most symbolically important sites.

The incident was ISIS first major attack in Iran, a nation that the group has targeted for years and repeatedly railed against. The seemingly coordinated, high-profile assault also comes amid heightened tension and instability across the region.

Wednesdays attacks have the potential to escalate ongoing diplomatic crises, offer ISIS a potent propaganda victory and draw Iran further into the already tangled conflicts in Iraq and Syria.

Its the first time that ISIS has been able to strike Iran within its border, so without any doubt its going to have significant consequences for the country both domestically and regionally, Ali Vaez, senior Iran analyst for the independent nonprofit International Crisis Group, told HuffPost.