The Kremlin has rejected US media reports claiming that Iran has sent short-range ballistic missiles to Russia to be used in the ongoing war in Ukraine.

According to The Iran Project, Kremlin spokesman Dmitry Peskov on Monday said he had seen the report but that not all such reports were correct.

"Iran is our important partner, we are developing our trade and economic relations, we are developing our cooperation and dialog in all possible areas, including the most sensitive ones," Peskov told reporters.

The Wall Street Journal on September 6 cited unidentified US and European officials as saying that Iran had shipped short-range missiles to Russia.

Citing its own sources over the weekend, CNN also reported that Iran had transferred missiles to Russia.  

The European Union also on Monday repeated the same accusation, saying "credible" information provided by allies suggested that Iran has supplied short-range ballistic missiles to Russia to help Moscow wage war in Ukraine and hinted at a "swift" response.