Sudbury First Nickel mine explosion: fire ignited explosives

Morning North5:03New details on Lockerby Mine explosion

Production resumes at Sudbury's Lockerby Mine after an explosion last weekend. We get the latest on the investigation into the cause of the incident.Production has restarted at First Nickel's Lockerby Mine in Sudbury following an explosion on Sunday.

A fire ignited explosives 6,700 feet underground, causing the eruption.

Four workers were treated for minor injuries, but they're said to be doing okay.

Vern Baker, the vice-president of the company's Sudbury operations, said the explosion was big enough to damage a vehicle and knock down ventilation tubing.

"We're certainly very thankful that no one was hurt any more than occurred, [and] hat our people were all able to walk away from it," Baker said.

"We're keeping the Ministry of Labour informed and then we're going forward. Obviously, once you've had an explosion like that, everything in that area has moved. So trying to reconstruct, it is fairly complicated."

Production has resumed at the mine, except for the area where investigators are trying to reconstruct what happened. Baker said he expects the investigation to be completed next week.

Anne-Marie MacInnis, the president of the union representing Lockerby workers, said they're staying involved in the process.

"We're on top of it. We have to be and we will be," she said.

There's no word yet on the cause of the fire.