TEHRAN — A huge fire has engulfed an oil refinery situated in the southern part of the Iranian capital Tehran, Iran's semi-official news agency Tasnim reported.

According to local media reports, there were so far no casualties.

All operations were suspended at the Tondguyan refinery as firefighters tried to put out the fire, local media said.

"A leak at a liquid gas pipeline at the facility sparked the fire," Mansour Darajati, the head of Tehran's crisis management organization, told state TV.

The cause of fire will be investigated, he added.

Shaker Khafaii, head of the Tehran Oil Refining Co, which runs the refinery, ruled out the possibility of sabotage, Iran's state TV reported.

Iranian media said ambulances and firefighters had been dispatched to the area while TV said thick plumes of black smoke over the refinery could be seen from different parts of Tehran.

The fire at the refinery happened a few hours after Iran's largest navy ship the Kharg caught fire and later sank in the Gulf of Oman. — Agencies