Australian doctors have flooded social media with messages of support in the wake of the Christchurch terror attack, which left at least 50 people dead and dozens more injured.

As tributes were paid to the victims of the mosque attacks and vigils held across New Zealand and at home, medics treating those wounded in the mosque attack were still trying to “comprehend the incomprehensible”.

There were still 34 people being cared for at Christchurch Hospital – 12 of whom in intensive care – while a four-year-old girl was fighting for her life at a hospital in Auckland.

Dr Greg Robertson, chief of surgery at Christchurch Hospital, described how victims were brought to the hospital in cars as well as ambulances as the horror unfolded on the streets of an otherwise peaceful city.