Several explosions were heard in southern parts of Iran, including Bushehr, where one of Iran's nuclear plants is located, Konarak, and Choghadak, Iran's Mehr news agency reported on Thursday.
Iran had activated its air defense systems in three different regions shortly beforehand, according to Ma'ariv citing local reports.
US officials told The Jerusalem Post that America was not responsible for the explosions. However, a Bushehr official told IRNA that a military site in the region was hit by a US-Israeli projectile.
US reportedly strikes Bushehr nuclear power plant, over 90 sites across Iran
A Russian-built nuclear power plant was reportedly hit in US strikes on Iran's Bushehr province early Thursday morning, according to Iranian state media.
According to the deputy governor of Bushehr Province, a US projectile hit the perimeter area of the facility, which had already been hit several times during the current conflict prior to the April 8 ceasefire.
The most recent round of US strikes on Iran was completed early Thursday morning. The US military struck approximately 90 sites throughout southern Iran "to further degrade Iran's ability to attack commercial shipping and innocent civil mariners in the Strait of Hormuz," the US Central Command (CENTCOM) said in a statement on X/Twitter.
Iranian officials said the US attacks had killed 14 people and injured 78 across five provinces on Wednesday and Thursday, state media reported.
Civilian infrastructure targeted, rail services disrupted as bridge struck by US
Iranian passenger train services between Tehran and Mashhad were temporarily suspended following a reported US strike on a railway bridge connecting the two cities, state broadcaster Islamic Republic of Iran Broadcasting (IRIB) claimed.
“Following the criminal US attack early this morning on a section of the Tehran-Mashhad railway, passenger train services have been disrupted," IRIB posted on X/Twitter on Thursday.
Passengers stranded due to the disruption reportedly began chanting, "Iranians do not accept humiliation, even at the cost of their own lives."
Repair teams are currently working to fix the damage and restore the route, and other arrangements are being made to transport passengers to Mashhad by road, according to IRIB.
The transportation disruption comes as mourners travel to farewell Iran’s former supreme leader, Ayatollah Ali Khamenei, before he is scheduled to be laid to rest in the city of Mashhad.
IRGC claims US attempt to overshadow Khamenei’s burial
The Islamic Revolutionary Guard Corps (IRGC) allegedly claimed on Thursday that the US strike on the railway was a deliberate attempt to overshadow Khamenei’s burial, as reported by Iranian state media.
Iran's state-organized funeral processions, which began last week, serve both as a religious commemoration and a demonstration of continuity for the Islamic Republic following the death of the leader who ruled Iran for nearly four decades.
The week-long procession, which carried Khamenei's body, included public events in Qom, Najaf, and Karbala – important Shiite centers in Iran and Iraq – before reaching the final destination of Mashhad, home to the country's holiest pilgrimage shrine.
US strikes target key Iranian trade route
The Aq Taqeh Khan railway bridge in northern Iran's Golestan province was also reportedly hit by US strikes overnight, according to IRGC-run Fars news agency.
The particular rail line on which the bridge was located serves as a vital trade link connecting Tehran with its strategic partners, China and Russia. Fars reported that the route continues through Turkmenistan and Kazakhstan, making it an important land corridor to China in particular.
This link has gained significance, especially during this year's blockade of Iran's Gulf ports by the US. Additionally, this route has been utilized by Russia for cargo shipments to Iran since late 2025.
The agency said repairs to the bridge were expected to be completed quickly.
A new wave of strikes?
Following the US strikes overnight, reports of several explosions were heard in Iran's Bushehr province, home to Iran's nuclear power plant, on Thursday morning, according to Iran's semi-official Mehr news agency.
Later, Iranian state media reported that the perimeter of the Bushehr nuclear power plant was struck by a US projectile.
Additionally, explosions were also heard in Iran’s Bandar Abbas on Thursday, according to Mehr.
Reuters and Jonah Davidov contributed to this report.