Pentagon officials reported Friday that the 4 of the 26 missiles fired by Russian warships in the Caspian Sea landed in a rural area of northern Iran.

Both Iran and Russia deny the claims, saying that it’s propaganda. Russia states that all 26 missiles hit ISIS targets in north and northwest Syria. The Russian defense ministry posted this on Facebook: “No matter how unpleasant and unexpected it is for our colleagues in the Pentagon and Langley, our strike yesterday with precision-guided weapons at Isis infrastructure in Syria hit its targets.”

Reports on Iranian TV indicated that an “unidentified flying object” had crashed and exploded in a village, killing a number of cows. At this time it’s still unclear if that object was a Russian missile, but social media posts showed missiles flying overhead at low altitudes.

A U.S. defense official said that the missiles used by Russia to attack Syrian targets are typically used to attack heavy air defenses, which the Syrian rebel groups do not have. They speculate that the use of the cruise missile is a sign of Russia’s power to the rest of the world.

The Pentagon report comes days after Russian forces coordinated attacks with the Syrian military to attack Syrian rebel groups. Russia continues to claim that their presence in Syria is to fight ISIS, despite their continuous attacks on groups that are against the Syrian President Bashar al-Assad regime.