BBC:

The warning comes as the US and European Union have been seeking to curb Iran's oil exports.
Leaders from various nations are travelling to the region in a bid to seek extra supplies to offset any shortfalls.
Iran has warned of retaliation against any output increase.
According to the Sharq daily newspaper, Mohammad Ali Khatibi, Iran's representative to Opec, said that "our Arab neighbour countries should not co-operate" with the US and European countries.
He added that any measures taken by the countries would not be perceived as "friendly", adding that if they give "the green light to replacing Iran's oil these countries would be the main culprits for whatever happens in the region - including the Strait of Hormuz".