Last week, Iranian President Hassan Rouhani said the sharp fall in global oil prices was the result of "treachery," a remark interpreted as a reference to Saudi Arabia.
Saudi says oil decisions not linked to politics →
"The fall in crude price is not merely an economic issue," Mr. Rouhani told reporters in Tehran. "Iran and people of the region will not forget such conspiracies — or, in other words, treachery — against the interests of the Muslim world."
Oil prices plummet worldwide as OPEC infighting intensifies →