A man is dead and a woman is critically injured after a stabbing in south Auckland today.

Police were called to a house on Great South Road in Manurewa at 11.24am.

The woman with stab wounds was found at the house. She was taken to Middlemore Hospital in a critical condition, a police spokeswoman said.

Shortly afterwards a man was found near a rail bridge. He could not be revived.

His death was not considered suspicious, police said.

Residents said there was a large police presence in the area.

Trains have stopped on one of the Auckland lines due to the incident and Veolia said no trains were running between Papakura and Homai.