France urged Iran on Wednesday not to scale back further on its commitments to a 2015 nuclear deal, saying Tehran’s new threat to speed up uranium enrichment next month was “especially worrying”.

The United States has criminally charged a major Turkish bank with helping Iran evade sanctions against it, potentially raising diplomatic tensions as the US tries to contain Turkey’s military offensive in Syria.

Iran, a large oil producer, saw its oil revenues surge after a 2015 nuclear pact agreed with six major powers that ended a sanctions regime imposed three years earlier over its disputed nuclear programme.

France demanded on Wednesday that Iran immediately release two of its nationals who have been held in prison since June, a situation that is likely to complicate Paris’s efforts to defuse tensions between the United States and Tehran.

France demanded on Wednesday that Iran release immediately two of its nationals who have been held in prison since June, a situation that is likely to complicate Paris’s efforts to defuse tensions between the United States and Tehran.

Russian Special Presidential Envoy for Syria Alexander Lavrentyev has discussed Turkey’s offensive in Syria and security in the Middle East with Secretary of Iran’s Supreme National Security Council Ali Shamkhani.

Iranian activist Rouhollah Zam, who has been captured by Iran, had refugee status in France, the French foreign ministry said on Wednesday, condemning his arrest.

France demanded on Wednesday that Iran refrain from entering a new phase of “especially worrying” reductions to Iran’s obligations to a 2015 nuclear deal with world powers.

French researcher Roland Marchal is being held by Iranian authorities, France’s Foreign Ministry said on Wednesday.

The United States carried out a secret cyber operation against Iran in the wake of the Sept. 14 attacks on Saudi Arabia’s oil facilities, which Washington and Riyadh blame on Tehran, two U.S. officials have told Reuters.