The United States and Iran exchanged a barrage of strikes overnight, an outburst of violence that killed both military personnel and civilians in Iran, including four people at a wedding, according to Iranian news media and officials.

U.S. Central Command, which oversees the military’s operations in the Middle East, said it had struck Iranian military targets in retaliation for attacks on ships and U.S. forces in the region.

Four members of the aerospace division of the Revolutionary Guard were killed in a U.S. strike in the western city of Kermanshah, according to a Guard statement published Wednesday by Tasnim, an Iranian news agency. At least 12 people were killed in strikes across Iran’s southern region, Iranian state outlet Press TV reported Wednesday.In response to the latest attacks, Iran’s Revolutionary Guard said in statements Wednesday morning that they had launched missiles overnight at a U.S. military base in Jordan, at U.S. military equipment warehouses in Iraq and at an air base in Kuwait hosting U.S. forces.

A U.S. official, speaking on condition of anonymity to discuss operations, said Wednesday all U.S. service members were accounted for but declined to share any damage assessments.

The deadly back-and-forth overnight was a demonstration of the stalemate between Washington and Iran more than six months after President Donald Trump launched strikes on Iran, saying that he expected a quick resolution.

Among the locations hit by the U.S. military was a wedding in a residential area in the small port town of Kuhestak in the Hormozgan province of southern Iran, according to Iranian officials. Four people, including a child, were killed in the attack, with around 50 others wounded and hospitalized, Iranian state media reported.

U.S. Central Command said it was aware of the reports. “The U.S. military never targets civilians, unlike the IRGC,” the military said, referring to the Revolutionary Guard.

In a social media post Wednesday, Esmaeil Baghaei, spokesperson for Iran’s Foreign Ministry, condemned the strike and vowed that Iran would respond “with firmness.”

The Jordanian military said Wednesday that 13 ballistic missiles had entered the country’s airspace. Ten were intercepted and three others fell in remote, unpopulated areas, the military said on social media. Kuwait’s military said Wednesday that its air defenses were confronting attacks by Iranian drones, and Bahrain’s military said it had intercepted Iranian aerial attacks.

Later in the day, Mohsen Rezaei, a top Iranian security official, wrote on social media that Iran would soon unveil a “new strategy on the battlefield, in diplomacy, and in confronting the economic blockade,” referring to an ongoing U.S. naval blockade of Iran’s ports.

Iran has insisted it should control the passage of ships through the Strait of Hormuz, which sits on its southern coast and, before the start of the U.S.-Israeli war, was a key waterway for the transit of oil and other critical resources. The U.S. Navy has been helping ships navigate a southern route through the strait, near the coast of Oman, drawing attacks from Iran.

In a statement, the Revolutionary Guard promised unspecified “additional punishments” for ships that took the U.S.-backed route. The Revolutionary Guard added that two oil tankers trying to transit the Strait of Hormuz had struck mines, exploded and were on fire. That claim could not be immediately verified.

The Saudi Foreign Ministry said Wednesday that Iran had targeted a Saudi tanker named Sidr passing through the Strait of Hormuz. Bahri, a Saudi shipping company that operates the tanker, said in a statement that two Filipino seafarers were killed during a “security incident” Monday.

A diplomatic off-ramp does not appear to be immediately available, analysts say. Recent efforts by mediators to revive talks, including a visit by the Qatari prime minister to Iran last week, have not delivered a breakthrough.

“I think the diplomatic track has been stuck for weeks,” said Sanam Vakil, the director of the Middle East and North Africa program at Chatham House, a research organization in London. “The designated mediators are doing what they can and they’re still unable to make progress with both sides.”

Domestic divisions in both Iran and the United States, and a lack of clarity on where they stand on some issues, made a new escalation “only a matter of time,” Vakil said.

Iran’s currency hits record low

Iran’s currency market hit a record low Wednesday, hours after the exchange of fire between the country and the U.S. over control of the Strait of Hormuz.

Traders in the Tehran market exchanged 2.20 million rials for one U.S. dollar, nearly 10% higher than last week’s record, on Aug. 25, when one dollar was sold at 2.02 million rials.

The currency had already been under pressure before the U.S. and Israel attacked Iran on Feb. 28, as Iran faced double-digit inflation and negative growth. The rial has repeatedly hit new lows since the war began.

Chinese and Egyptian leaders meet in Cairo

The leaders of China and Egypt welcomed regional efforts to “reach political understandings” aiming at restoring peace and stability in the Middle East amid renewed escalation between Iran and the United States.

President Xi Jinping of China and Egypt’s President Abdel Fattah el-Sissi held talks in Cairo on Wednesday that focused on bilateral ties and regional and international topics.

They welcomed regional efforts to ease tensions and promote “peace and stability in the Gulf and the Middle East,” according to a joint communique following the talks.

Information from the Associated Press was included in this story.