Tehran: An accidental blast killed five special effects crew of an Iranian film when real-life explosives detonated as they were being delivered to the set on Wednesday, media reported.
Two other crew were hurt in the explosion, in a car transporting the material to the set, some 30 kilometres (18 miles) southwest of Tehran, the ISNA news agency reported.
The Mehr news agency said the explosives were TNT.
A member of the movie industry`s special effects union, Abbas Shoghi, criticised authorities for banning the import of specialised material.
"We are forced to use real-life explosives for a movie shoot because security authorities do not allow the import of props that are used in movies," Shoghi told ISNA.
The movie, called "Merajiha" ("Ascensionists"), is a war film built around a story of soldiers going to heaven after they are killed. It is being directed by Masoud Dehnamaki, known for his controversial "Outcasts" trilogy.
