A man is fighting for his life and a woman is in police custody after an alleged stabbing in Port Augusta, South Australia . Police and paramedics were called to a Higginson Street address at about 3.30pm yesterday. He was treated by paramedics and has been airlifted to Adelaide in a critical condition. A 47-year-old woman was arrested at the same address and charged with attempted murder. She was refused bail and is expected to appear in court on Tuesday.Police believe the alleged attack is not random and claim the man and woman are known to each other.