A man left seriously injured by a fly-in, fly-out worker’s stabbing spree in Western Australia’s north is awake in intensive care, his family says.

Konrad Frost, 39, remains in a critical but stable condition at Royal Perth Hospital after he and six other people were stabbed in South Hedland on Friday.

The rampage came to an end when FIFO worker Ashley Dean Fildes, 34, was shot dead by police at the South Hedland Square shopping centre.

Mr Frost’s family issued a statement on Monday saying he was communicating and “doing well” but faced a long road to recovery.

“Konrad is kind, funny and thoughtful – very much a gentle giant who loves his family. We are all in shock something like this could happen to him,” the statement says.

“We want to say a huge thank you to the amazing teams at Hedland Health Campus, Royal Flying Doctors and Royal Perth Hospital. We are forever grateful to you all for saving Konrad’s life.”

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Mr Frost, a bulk haulage worker, underwent surgery after being airlifted from Hedland Health Campus late on Friday.

Police say Fildes stabbed a man at a motel and another in a car at the local McDonald’s before entering the shopping centre and attacking two men and three women.

Two officers attempted to subdue him and fired a Taser before he lunged at them with a 40cm knife.

One of the officers fired several shots and Fildes died at the scene.

Five victims aged 19 to 37 were treated at Hedland Health Campus and discharged while a man aged 20 did not require medical treatment.

Fildes had reportedly battled mental health issues.

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WA Police Union president Harry Arnott said it was a “textbook shooting” of a frenzied “madman” by two brave and experienced sergeants.

“He was actively chasing people with that knife … the coroner will find, in the fullness of time, that these police officers did exactly what they needed to do,” he said.

AAP