The United States struck scores of targets in Iran, sparking retaliation from Tehran on American allies in the Gulf as Iranians laid to rest their assassinated supreme leader Ayatollah Ali Khamenei.
Iranian state media reported that a US-Israeli projectile hit a military headquarters on the outskirts of Bushehr, where its only civilian nuclear plant is located.
"Moments ago, a military headquarters on the outskirts of Bushehr was attacked and hit by a projectile of the American-Zionist enemy," state news agency IRNA quoted deputy governor of Bushehr Ehsan Jahanian as saying.
A US defence official however said that the US military was not currently carrying out any strikes on Iran.
Meanwhile, dozens of missiles and drones fired by Iran caused no significant damage or injuries to American personnel, a US defence official said.
They "were intercepted or failed to cause major damage," the official said on condition of anonymity, adding that there were "no US injuries".
Explosions were heard over the Bahraini capital of Manama on Thursday morning and air raid sirens sounded for a third time after Iran's military said it had targeted sites in the Gulf kingdom as well as in Kuwait and Qatar.
Earlier, Iran's Revolutionary Guards said they had struck "key infrastructure and facilities" at US bases in Arifjan and Ali Al Salem in Kuwait, and Juffair and Sheikh Isa in Bahrain.
Iran buries Khamenei
Iran late Friday laid to rest its former supreme leader Ali Khamenei over four months after his killing in an airstrike, as two days of US and Iranian attacks raised fears of a return to all-out war.
Khamenei's flag-covered coffin was carried aloft into the shrine of Imam Reza in his home city of Mashhad in eastern Iran as a sea of people waited outside and listened to prayers, with no sign of a public appearance by his son and successor Mojtaba Khamenei.
The "body of the martyred leader of the Islamic Revolution was buried in the memorial hall of the shrine of Imam Reza," state broadcaster IRIB reported.
The burial came after another day of tit-for-tat attacks by Washington and Tehran's forces, with Iranian officials reporting that US strikes killed 17 people and state media saying one targeted a railway line between Tehran and Mashhad.
The Islamic republic said it had resumed attacks targeting US assets in Kuwait, Bahrain and Qatar, while sirens blared in Jordan -- another American ally -- where the military said it had intercepted eight missiles launched from Iran.
Khamenei was killed alongside close family members on the first day of the US-Israeli war against Iran on February 28.
The last of a marathon six days of funeral ceremonies, Khamenei's burial in Mashhad was closely watched for signs of Mojtaba Khamenei, who has yet to appear in public since being appointed.
Parliament speaker and chief negotiator in talks with the United States, Mohammad Bagher Ghalibaf, powerful chief justice Gholamhossein Mohseni Ejei, and Khamenei's eldest son Mostafa Khamenei were all present at the shrine, with some senior figures weeping over Khamenei's coffin, state TV images showed.
But as on other days of the funeral process, there was no sign of Mojtaba Khamenei, who since being named has only communicated through written statements and is said to have been wounded in the February 28 strikes.
- 'We will kill you' -
Crowds of men and women clad in black, many urging vengeance against US President Donald Trump, had massed in Mashhad against the backdrop of slogans including: "Hey Trump we will kill you," written in English, AFP correspondents said.
The Wall Street Journal meanwhile reported, based on anonymous sources, that Israel told the United States that their intelligence had detected a new Iranian plot to kill Trump.
The United States targeted the perimeter of Iran's only civilian nuclear plant with a strike, Iranian state media reported, citing the deputy governor of Bushehr province.
State media said the United States targeted a section of the Tehran-Mashhad railway 55 kilometres (34 miles) from Mashhad, forcing the closure of the line. Passengers were transferred to buses.
Iran's army said it had targeted a Patriot missile system in Kuwait, an early warning system in Qatar and fuel tanks in Bahrain with drones, as part of its attacks on US bases in the region.
- 'Third' attack on Iran? -
Following Israel's June 2025 war against Iran and this year's conflict, Defence Minister Israel Katz warned at a military ceremony that Israel was prepared to attack Iran for a "third time" if needed, vowing to do so "with even greater force".
"We are preparing for every scenario," added Prime Minister Benjamin Netanyahu, whose office said he spoke with Trump on Thursday, with the US president providing an update on "American moves in the Gulf."
The Strait of Hormuz, a vital oil and gas corridor, remains a key point of contention between the two sides, with Tehran insisting on control of the waterway despite it being open to free passage before the war began.
The Iranian military hit at least three ships in recent days, prompting extensive US strikes against Iranian targets from Tuesday.
Traffic through the strait has fallen sharply since Wednesday, especially through the UN-backed Omani route, according to data from maritime tracking firm Kpler, after vessels were attacked earlier this week.