Live updates: Iran walks away from talks, Tasnim says

The Islamic Revolutionary Guard Corps said on Monday that it launched a retaliatory attack on an unnamed air base following U.S. strikes on the Iranian island of Sirik in the Hormozgan region, which sits along the Strait of Hormuz.

"Following the aggression of the U.S. military against a telecommunications tower on Sirik Island, located in Hormozgan Province, an hour ago, IRGC Aerospace Force fighters targeted the air base from which the aggression originated, and the predicted targets were destroyed," the IRGC said in a statement carried by the semi-official Fars News Agency.

"If the aggression is repeated, the response will be completely different, and the responsibility lies with the aggressor and child-killing American regime," the IRGC said.

After meeting with his team in the Situation Room for about two hours on Friday to make a "final determination" about a deal with Iran, President Donald Trump has yet to announce a decision.

Following the meeting, a White House official said in a statement, "President Trump will only make a deal that is good for America and satisfies his redlines. Iran can never possess a nuclear weapon."

It is not clear why the president still has not announced a decision.

-ABC News' Mary Bruce and Michelle Stoddart

The U.S. Treasury Department has sanctioned the Persian Gulf Strait Authority - the entity created by Iran to manage and charge for passage through Strait of Hormuz.

Prior to this move, the Treasury Department had already warned that providing payment to the PGSA for passage through the strait could open the payer up to sanctions risks, and that firms that facilitate financing could be subject to secondary sanctions. The move to formalize the sanctions is a potential sign the administration could seek to step up enforcement of the penalties.

President Donald Trump's meeting in the Situation Room about the possible draft deal with Iran has ended, according to a White House official.