Iranian journalists have warned of a media crackdown after a series of incidents, the most recent an explosion at a munitions company in which one person was killed and two injured.

The explosion on Tuesday, for which there has been no official explanation, occurred in Isfahan, only two days after a thwarted cyber-attack on the communications infrastructure on Sunday, and a huge explosion on Saturday at the strategic southern port of Shahid Rajaee, near Bandar Abbas.

The death toll from the explosion at the port has increased to 65, with more than 1,000 people injured.

Iran has ruled out foreign involvement in the Shahid Rajaee explosion, pointing instead to negligence and strong evidence that unlabelled combustible chemicals, undeclared to customs, were inappropriately stored, leading to a fire and a deadly chain reaction of explosions…

Suspicion of cover-ups is rife, however, and the filing of criminal charges against media outlets and activists by the Tehran prosecutor’s office has caused journalists in Iran to voice concern about press freedom…

Iranian officials have blamed mislabelling of dangerous cargo, but media outlets have not yet identified the company alleged to have imported the combustible material…

Mohammad Baqer Qalibaf, the speaker, said parliament was looking at whether any negligence or intent was involved…