June 27 (UPI) — The United States attacked Iranian drone sites Saturday morning, and Iran hit Bahrain in response.

In Bahrain, two one-way attack drones hit the country, according to the New York Times. One was shot down by a ground-launched air-defense weapon, a U.S. official told the Times, and the other landed without harm in a remote airfield.

“This constitutes a flagrant violation of its sovereignty, a blatant threat to the safety of citizens and residents,” Bahrain’s foreign ministry said in a statement.

The United States used six F35 and F16 Air Force jets to hit four Iranian sites in the strait, an anonymous official told The Times.

Ebrahim Azizi, a conservative Iranian lawmaker, said in a social media post that the U.S. attacks on Friday were a “reckless violation of the cease-fire” and warned that the attacks would lead the United States to “retreat and regret.”

Azizi added that the strikes show that President Donald Trump “has no commitment to the principles of negotiations.”

On Friday afternoon, Trump ordered strikes on Iran after it staged a drone strike on a shipping vessel transiting the Strait of Hormuz. The president had made vague threats on Iran and said that the country had attacked ships in the strait.

Vice President JD Vance, who has been handling the negotiations, posted on X that the United States had honored the MOU.

“If they have disagreements about how the MOU is being applied, they can pick up the phone,” he posted. “But violence will be met with violence.”

Saturday morning, another ship was hit in the strait by an “unidentified projectile” damaging its bridge but causing no injuries to the crew, according to the United Kingdom Maritime Trade Operations Center. The organization didn’t say who launched the attack.

Mohsen Rezaei, a former Iranian military chief who advises Supreme Leader Mojtaba Khamenei, accused the United States of “continuing to create tensions” in the strait. “The response to the violation of any article of the memorandum of understanding will be swift and decisive,” he said in a post on social media, The Times reported.