Iranian government spokesman Abdollah Ramezanzadeh said Monday that the domestic source of a report that claimed last Wednesday's blast in the south of Iran was a result of a military attack could be legally prosecuted, the official IRNA news agency reported.

"I explicitly, announce that the source of the news is indictable according to the government and the Information Ministry," Ramezanzadeh was quoted as saying.

"It should be clear that who was the source of the false report and what was his motivation," Ramezanzadeh added.

The spokesman noted that the government expected those responsible for the publication of such false reports would not escape from investigation.

"People are entitled to know who was behind it," stressed Ramezanzadeh.

A large explosion was heard Wednesday in the southern Iranian coastal city of Daylam, and local residents said they saw an aircraft flew overhead then.

Daylam is located in the Bushehr province, 180 km away from Iran's first nuclear power plant.

It was later announced by local security officials that the explosion was caused by dynamites used for road construction in a mountainous region.

However, a domestic news source reporting on the event had primarily said that the explosion might have been caused by military attacks.

Source: Xinhua