Iran live updates: US forces conduct strikes on Iranian targets over Strait of Hormuz drone attack

Following Friday's strikes, Vice President JD Vance emphasized that Iran signed a ceasefire agreement and "can pick up the phone" if it has any issues with the memorandum of understanding, in a post on social media.

"Iran signed a ceasefire agreement. We have honored it. If they have disagreements about how the MOU is being applied, they can pick up the phone. But violence will be met with violence," he said.

Vance was in Switzerland earlier this week to negotiate the implementation of the MOU with Iran and mediators.

-ABC News' Hannah Demissie

Friday's airstrikes against Iran mark the first U.S. military strikes on Iranian targets since the memorandum of understanding was signed on June 17, and the first test of whether the peace process it launched can withstand direct attacks between its signatories.

The strikes were designed with the goal of having a large enough scope to send a strong message on freedom of navigation through the Strait of Hormuz and provide a "course correction," but limited enough to avoid restarting the conflict and significantly derailing diplomacy, a U.S. official said -- adding the caveat that whether or how Iran chose to respond would play a big part in that.

The official said there was initially some debate within the administration over whether it was necessary to launch a military response to Iran's drone strike on the Singapore-flagged cargo ship, but that chilling effect on traffic in the strait and Tehran's messaging on managing the waterway drove the decision.

On U.S.-Iran negotiations, working-level groups have been continuing to work on key areas, and a fresh round of technical talks is currently scheduled to resume at the beginning of next week in Switzerland.

-ABC News' Shannon Kingston

The retaliatory U.S. airstrikes against Iran are over, according to a U.S. official. They lasted about an hour.

The U.S. military response to Thursday's Iranian drone attack on the container ship is limited to these "powerful" strikes for now, according to a U.S. official.

-ABC News' Luis Martinez

U.S. forces conducted strikes on Iran on Friday in response to the Iranian drone strike on a Singapore-flagged cargo ship in the Strait of Hormuz, according to U.S. Central Command.

"The unwarranted aggression against commercial shipping by Iranian forces clearly violated the ceasefire. Furthermore, Iran's dangerous behavior undermined freedom of navigation as commerce increasingly flows through the vital international trade corridor," CENTCOM said in a statement.

The U.S. on Friday targeted Iranian missile and drone storage locations as well as coastal radar sites, CENTCOM said.

The strikes are ongoing, according to a U.S. official.

The strikes were announced shortly after President Donald Trump told reporters in the Oval Office that "you're going to find out" if the U.S. will respond.