The allegations, which have been circulating for months, were addressed by Iran's foreign ministry during a press conference on Monday, September 9.
The spokesperson for Iran's foreign ministry, Nasser Kanani, categorically rejected the claims: "We strongly reject the accusations regarding Iran's role in exporting arms to one side of the war."
Kanani, however, emphasised that Iran maintains a neutral stance in the conflict and does not support any side through military means.
"We have clearly stated that we are not part of the war and conflict in Ukraine. We believe that the political solution is the best solution to end the current crisis in Ukraine," he added.
According to reports from US media last week, Washington suspects that Iran has supplied weapons to Russia for use in the Ukraine conflict, based on information from anonymous sources.
Meanwhile, EU spokesman, Peter Stano has said the union was aware of credible information to confirm Iran's involvement in sending arms to Russia.
"We are aware of the credible information provided by allies on the delivery of Iranian ballistic missiles to Russia. We are looking further into it with our member states and if confirmed, this delivery would represent a substantive material escalation in Iran's support for Russia's illegal war of aggression against Ukraine," Stano said.