A DMP spokesman told MiningNews.Net an investigation into the incidents at the company's Solomon mines was underway. At this stage it could not speculate on the outcome of the inquiries.

"The incidents included a blast exclusion zone incident, two water truck incident reports and an incident involving an integrated tool carrier and a worker who received minor injuries," the DMP said.

"The worker was transferred from Tom Price Hospital to Port Hedland Hospital by the Royal Flying Doctor Service."

The accidents are the latest in a spate of serious incidents at the company's Pilbara mines.

Fortescue's Christmas Creek mine has been rattled by two deaths in recent months, with contractor Kurt Williams killed in a crushing accident in August and Allen Zuvela killed in an incident at a heavy vehicle workshop in late December.

Another worker also received leg and hand injuries in the accident that killed Zuvela.

The DMP said if the latest investigations found any shortcomings in Fortescue's procedures, appropriate enforcement action would be taken.

"Any incident is of concern and mine operators across WA's resources sector should always be looking to maintain and improve safety outcomes," it said.

In a statement to MiningNews.Net this morning Fortescue CEO Nev Power said the company was continuing to work at improving safety procedures at its operations.

"Safety is core to everything we do at Fortescue and as CEO, I am ultimately accountable for the health and safety of everyone who sets foot on a Fortescue site," he said.

"I would like to make it absolutely clear that no one on a Fortescue site is ever expected to do anything that compromises safety. Our culture empowers everyone to take whatever action is required to ensure safe operation, including stopping production when necessary."

"We are working to ensure our systems are as effective as possible in keeping people safe and that each of the 10,000 people working for and with Fortescue understand that the health and safety of our people is our highest priority."

Power also made similar comments in a video released this week.

Last month Zuvela's death saw the DMP order Fortescue to tighten safety practices at Christmas Creek, with a particular focus on lock out/tag out procedures.

The move came after the DMP said there were "cultural issues" relating to how smaller contractors operated on the company's sites.

Earlier this week Fortescue also said it had purchased two ore processing facilities at Christmas Creek in an effort to align the safety culture on site and reduce debt.