Iranian media reported that Moscow expressed readiness to invest in Iran's steel, oil and petrochemical industries.
The US recently targeted Iran's unmanned aerial vehicle industry over its supply of drones to Russia.
After US sanctions were imposed on Iran in 2018, Iranian exports have taken significant hits worldwide.
Iran's arming of Russia crossed a red line and Tehran appears to believe it cannot go back - instead it's increasing its cooperation with Moscow.
The Iranian foreign ministry announced it has summoned the UK ambassador over what it called London's "meddling in Iran's national security realm."
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