At least seven ships were on fire in the southern Iranian port city of Bushehr, Tasnim reported on Wednesday, adding that the cause of the fires remains unclear.
Efforts are underway to bring the fire under control, IRNA cited Jahangir Dehghani, the head of the crisis management organization for Bushehr province, as saying.
The incident follows a series of explosions which have rocked Iran in recent weeks.
An explosion occurred at an Iranian chemical plant Monday, Iranian media reported.
The blast allegedly occurred at a gas condensate plant in the Kavian Fariman industrial zone in the Razavi Khorasan Province in eastern Iran. The explosion was caused by a fire which broke out at one of the gas tanks.
Firefighters were able to put out the blaze before it spread to other tanks and caused additional explosions. The cause of the fire is under investigation.
A gas explosion shook a residential building in Tehran, Iran, on Saturday, injuring one person, Iran's semi-official ISNA reported.
On Friday, IRIB reported that an explosion was heard in Western Tehran, and electricity had been cut in the area around where the explosion occurred.
Two people were killed in an explosion at a Tehran factory on July 7.
An explosion caused severe damage at the Natanz nuclear facility on July 2.
In June, an explosion near a military complex in Parchin area southeast of Tehran rocked the Iranian capital. Authorities blamed that blast on "leaking gas tanks."
13 people were killed in an explosion at a medical center in Tehran on June 30. Tehran Deputy Governor Hamid Reza Goudarzi told state TV that the explosion was caused by a gas leak.