An explosion at a liquified natural gas company in northeast Iran caused extensive damage on Monday, state media reported.

A gas condensate storage tank at the Petronaft company in the Kavian Fariman industrial complex caught fire causing the explosion, Javad Jahandoost, the head of the complex’s fire department, said.

The explosion caused extensive damage to Petronaft and a neighboring company, the semi-official ILNA news agency said.

Kavian Fariman industrial complex is situated some 32 kilometers south of the city of Mashhad, the capital of the north-eastern province of Khorasan Razavi.

The incident did not cause any casualties, said Jahandoost, adding that investigations are underway to determine the cause of the incident and the extent of the damages.

Iran has been witnessing multiple explosions and fires around military, nuclear, and industrial facilities since late June.

On Sunday, the semi-official Fars news agency reported a fire at a petrochemical facility in southwest Iran due to a hot oil leak.

Also on Sunday, an electrical substation caught fire in the Iranian capital Tehran, the official IRNA news agency reported.