Police say two men were stabbed in a fight about the coronavirus lockdown rules (file photo).

Two men received serious injuries after allegedly being stabbed in a fight relating to the coronavirus lockdown.

The incident took place in the Whangārei suburb of Raumanga on Sunday afternoon.

Northland police Detective Senior Sergeant John Clayton said two men from a property on Ikatere Pl were allegedly drinking on the street at about 12.50pm, to celebrate one of them turning 21 years old.

Clayton said two men from a neighbouring property challenged the men about their behaviour, given the Alert Level 4 restrictions to stop the spread of Covid-19.

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"An altercation has taken place and the two men from the original address have allegedly stabbed the two men who challenged them," he said.

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The neighbours received serious injuries and were taken to Whangārei Hospital, where they are both in a stable condition.

Two men, aged 21 and 15, have been charged with three counts of causing grievous bodily harm.

The 21-year-old appeared at Whangārei District Court on Monday and was remanded in custody until April 23.

The 15-year-old appeared at Whangārei Youth Court and was remanded in custody until May 15.

The incident occurred after the Salvation Army warned boredom drinking during lockdown could cause long-term problems for people.

Over the weekend, another Northlander, Trevor Thompson, was also charged with breaching the coronavirus lockdown.