Araghchi gave no details on Iran's response, but his remarks come amid global concern over Tehran's advancing nuclear program.

Iran has multiple major sites associated with its rapidly advancing nuclear program, now the subject of several rounds of negotiations with the United States

Speaking to the media following the conclusion of the fifth round of talks in the Italian capital, Araghchi said Iran presented its "positions and principles" during this round, calling it "one of the most professional so far."

DUBAI (Reuters) -Israel will receive a "devastating and decisive response" if it attacks Iran, Tehran's Revolutionary Guards said on Thursday, days after CNN reported U.S. intelligence suggesting Israel was making preparations to strike Iranian nuclear facilities.

U.S. Secretary of State Marco Rubio said that Iran is nearing nuclear capability as the U.S. weighs diplomacy against mounting pressure.

Oil prices settled lower on Wednesday, after Oman's foreign minister said a fresh round of nuclear talks between Iran and the U.S. would take place later this week. Prices had gained earlier in the session on a CNN report on Tuesday that U.