A fire that broke at an Iranian shipyard in the southwestern port of Bushehr has damaged at least seven ships without causing any casualties, local media reported.
Wednesday's incident appears to be the latest in a series of fires and explosions around the country, some of which have hit sensitive sites.
Plumes of dense black smoke billowed into the air, in a photograph of the incident published by the official IRNA news agency.
State-controlled broadcaster IRIB showed firefighters tackling clouds of smoke at the shipyard.
There have been several explosions and fires around Iranian military, nuclear and industrial facilities since late last month, including a fire at Iran's underground Natanz nuclear facility on July 2.
Natanz is the centrepiece of Iran's enrichment programme, which Tehran says is for peaceful purposes.
