Reuters:

Iran has built a third underground ballistic missile production factory and will keep developing its missile program, the semi-official Fars news agency quoted a senior commander of the elite Revolutionary Guard as saying.

The development is likely to fuel tensions with the United States in a week when President Donald Trump, on his first foreign trip, has called Iran a sponsor of militant groups and a threat to countries across the Middle East.

"Iran's third underground factory has been built by the Guards in recent years ... We will continue to further develop our missile capabilities forcefully," Fars quoted Amirali Hajizadeh, head of the Guard’s airspace division, as saying.

In 2015, Iranian state TV aired footage of underground tunnels with ready-to-fire missiles on the back of trucks, saying the facility was one of hundreds of underground missile bases around the country.

Two months after implementation of the deal, the Guards test-fired two ballistic missiles that it said were designed to be able to hit Israel.

Go to link