This is the horrifying moment a brown bear savaged two gas workers in Siberia, leaving both with serious head and arm wounds after wrestling with the beast.

In the video, three dogs are seen near the bear as it patrols the camp. A voice calls out to the dogs to get away.

The bear then enters the compound, chasing one of the dogs around a vehicle in the heavy snow. 

As one man leaves a trailer, the bear emerges from behind some bags of chemicals and attacks. 

One man forced onto the snow by the raging bear. Others try to deter the animal with what appears to be a fire extinguisher.

As the bear vanishes with the workers, one onlooker calls out: ‘Where is he?’

Another responds: ‘He’s ****** – [the bear] ate him there.’

There was panic as workers used fire extinguishers, flares and a gas spray to seek to scare the bear away

The bear managed to clamber through the fence to enter the gas-drilling compound in Siberia

It was seen walking around after lunging at a dog near the facility in Russia’s Yakutia region

A foreman and a mechanic miraculously survived a vicious bear attack at a gas-drilling facility in Russia’s Yakutia region

The two men were in the smoking room of their plant when they saw a pack of dogs chasing something, say reports.

One of the pair – a mechanic – opened the door to chase away the bear but it immediately attacked him.

There was panic as workers used fire extinguishers, flares and a gas spray to seek to scare the bear away.

Eventually it loosened its grip on the mechanic but immediately grabbed and savaged the plant’s foreman.

Workers called in a local hunter who came and shot the bear some 20 minutes after the attacks.

The two men were given first aid at the site and rushed by helicopter to hospital.

Read Related Also: Maryland man ‘nibbled’ on trick-or-treater’s ear, tried to shoot child’s mother: police

An image shared with MailOnline appeared to show a missing chunk of ear, apparently torn off by the bear in an attack. 

Voices from eyewitnesses on the video tell how the bear broke through the fence to enter the territory of the remote facility.

A man shouts to the bear – calling the predator Mishka – trying to get it away from the cabins where workers are gathered.

‘Look, he’s tearing the fence,’ says a worried voice.

‘He’s climbing over, he’s climbing over, isn’t he?’

He shouts: ‘Everybody run away. Where is he….?’

The bear was sighted near the trailer used as a smoking room by workers on the site

There was some commotion on the compound as workers tried to shoo off the bear

Workers called in a local hunter who came and shot the bear some 20 minutes after the attacks

Pictured: one worker is carried away after suffering serious injuries from the mauling

The two men were given first aid at the site and rushed by helicopter to hospital

Both survived the ordeal – but were left with serious injuries from the sudden attack

In October, a security guard at the five-star St. Regis Aspen Resort in Colorado was attacked by a black bear after it wandered into the building.

Security footage likewise captured the attack at the luxury hotel.

The staff member heard some commotion in the kitchen and went to investigate which is when he was attacked by the bear.

It leapt up on to its hind legs and swiped at the unidentified security guard, shoving him to the ground, before it quickly left the scene. 

He called 911, received treatment for scratches to his back and was released from hospital on Tuesday. While the bear was later found and euthanized by officers.