A man who died after a suspected assault was the fourth homeless man to die in violent circumstances in recent times.

Auckland police have arrested and charged a man with assault of the dead man.

The homeless man was admitted to Auckland Hospital shortly after 11pm on Tuesday but subsequently died. He was believed to have been assaulted sometime between 6.30pm and 10.30pm.

BEVAN READ/FAIRFAX NZ A man has been arrested in relation to another man's death in a central Auckland park on Tuesday

Police earlier described the death as unexplained but later said he had been assaulted.

They have not named the dead man but confirmed he was "of no fixed abode".

A number of violent incidents involving homeless men in Auckland have occurred since 2013.

A 49-year-old man, Maqbool Hussain, was beaten and stabbed to death in a temporary squat in Balmoral, on March 24 2014 by Justin Vance Turner, 29, who was enraged that Hussain was sleeping rough.

Homeless man Steven Harris, 54, was stabbed to death by his homeless friend Grenville Fahey, 49, in Auckland City's Myers Park in September last year following an argument.

In August 2013, Edwin Linder, 42, died in Auckland Hospital after being beaten up in a central Auckland alley by Steven Churchis, 18, who had also been living rough on the streets.

BEVAN READ/FAIRFAX NZ A man has been arrested in relation to another man's death in a central Auckland park on Tuesday

In each case the attackers were jailed for life for murder.

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A report published early this year by the Auckland Council highlighted the concern for those who slept rough on the streets of central Auckland.

It said those who slept rough were vulnerable to physical attack, especially from drunk patrons leaving bars and nightclubs as well as friends and family who also slept rough.

After the latest incident at Outhwaite Park, cordons have been set up as police investigate the death.

The cordons are in place around the perimeter of the small park.

Shift commander Inspector Kerry Watson said police were called to the scene, and were now investigating.

The man charged in relation to the death will appear in the Auckland District Court on Wednesday.

Detective Inspector Kevin Hooper said anyone with information about the circumstances leading up to the man's death should contact Auckland city police on (09) 302 6400.