A LOVE triangle is believed to be behind a double stabbing which left a man dead and a woman in injured at Sydney's Darling Point.
Neighbours called police after allegedly hearing an argument between a couple and a man at a unit near Rose Bay late Sunday.
Police were told the couple was inside their unit when the man allegedly forced his way in.
When paramedics arrived they found a man with stab wounds.
He died at the scene and his partner was taken to hospital with non life threatening injuries.
A man in his 20s was helping police with their inquiries.
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