US President Donald Trump had previously claimed no US forces were hurt in the attacks.
"These American clowns who lie and say they are with the Iranian people should see who the Iranian people are."
Russia says they believed US stealth fighters were on their way to Tehran.
"Nothing is business as usual when it comes to these hot spot situations, but [the troops] are as safe as they can be."
Iran announced on January 5 it would abandon all limitations on enriching uranium set down in the pact.
President Hassan Rouhani wants the US to return to the Obama-brokered nuclear deal.
The admission came as the President warned that European soldiers in the Mideast "could be in danger".
The rocket blasts are being called "fierce" by local media.
One of the missiles may have disabled the plane's transponder.