Two people were killed in a fire at a defence ministry plant east of Tehran for the production of explosives, Iran's state news agency IRNA reported Monday.
The Defence Industries Organisation, quoted by IRNA, said the fire broke out at the plant on Sunday night but it gave no further details.
Signup to our newsletter and follow us on Facebook and Twitter!
Several arms facilities and military bases are located east of the Iranian capital, including Parchin which UN nuclear inspectors have been seeking to visit to answer concerns about Iran's atomic programme.
The base lies at the centre of allegations of past Iranian research into sophisticated explosives that can be used to detonate a nuclear warhead.
Tehran, which has denied inspectors access to Parchin since 2005, insists its nuclear programme is for purely civilian uses.