A fire broke out at Iran’s Piroozi Oil and Gas Refinery in Shahroud, 400km west of Tehran, due to an explosion in one of the facility’s fuel storage tanks. As a result of the incident, the refinery lost nearly 100,000 liters of fuel, reported Trend News Agency.

Four people were injured and reports stated that parts of the refinery’s processing facilities were damaged. However, officials have rejected the idea of sabotage or coordinated attacks. They have blamed the fire on leaks and technical mishaps, in addition to poor health and safety inspections at private refineries and petrochemical plants, according to Financial Tribune.

The $57m plant was built in March 2016, with the aim of processing crude oil and gas condensates, an ultra-light crude, to produce gasoline and diesel.

Iran’s key oil, gas and petrochemical sectors have grappled with similar incidents in recent months. Earlier September, a fire had broken out in a petrochemical plant in the southern Iranian province of Bushehr, injuring four people. The plant in questioned is owned by Mobin Petrochemical Company which had stopped gas flow to the pressure control station to avoid further damage.