A semiofficial Iranian news agency says an explosion has killed several members of the Islamic Revolutionary Guards Corps (IRGC) at a military base in western Iran.
The Fars News Agency, which is close to the Guards, said that several others were injured and taken to hospitals in Khoramabad, 500 kilometers southwest of the capital, Tehran.
It said the cause of the blast was under investigation.
Other Iranian news agencies described the explosion as accidental.
The Mashreghnews.ir news website was the sole outlet to give an exact toll, reporting that 12 guards and been killed and 20 injured.
The site has ties to Iran's presidency.
Iran's northwestern border area has witnessed several attacks by ethnic Kurds disgruntled with the central government.
compiled from Reuters reports