Fire at Russian petrochemicals plant kills at least three

MOSCOW, March ​31 (Reuters) - A ⁠large fire broke out at ​a petrochemicals plant in Russia's Tatarstan region on Tuesday, killing at least three people, including a ​firefighter, ‌and injuring dozens.

Sibur, the company that owns the sprawling Nizhnekamskneftekhim complex, said two employees ⁠had been killed in the accident, with 68 ⁠injured. Twenty-one people remained hospitalized, ​three in serious condition.

The branch of Russia's Emergencies Ministry in Tatarstan said one firefighter died from injuries sustained from a nearby explosion. Three others were injured.

Sibur ​said ‌a gas mixture had exploded following a loss of pressure at a facility producing synthetic rubber and plastics. It said it was not clear what had caused the gas to ignite.

Sibur CEO Mikhail Karasalov said ​in a statement that production at the plant would be reduced by about ‌6% of its annual output of 180,000 metric tons "but the focus at this time is on people, not ‌the number of tons."

Firefighters had contained the blaze and there was no risk of it spreading, the company said, adding specialists were checking air quality ​and had not detected any threats to the environment or local residents.

The Emergencies Ministry, in ‌a statement quoted by news agencies, said an aircraft had been dispatched from Moscow to Nizhnekamsk, about 1,000 km (620 miles) to the east to bring ⁠the injured to ⁠the capital for treatment.

Russia's aviation regulator briefly ‌imposed restrictions at the Nizhnekamsk airport.

Radmir Belyaev, the local mayor, said in a statement that windows ​had been blown ​out in several apartment blocks.

Unconfirmed images on social ‌media showed a large plume of smoke billowing into the sky from the complex. (Reporting by Oksana Kobzeva; writing by Maxim Rodionov and Lucy Papachristou; Editing by William Maclean, Ron Popeski and Chris Reese)