A fire at Haldia company’s refinery in India’s West Bengal state has left dozens injured. According to the report, the cause of the blaze has not yet been determined.

Some of the injured are in critical condition. No further details have yet been released on the exact number of casualties or the cause of the incident.

Haldia Petrochemicals operates a 700,000-ton-per-year ethylene unit in West Bengal. According to the source text, the majority of the company’s shares are held by the U.S.-based private group TCG.