NSW Police arrest man after woman stabbed in vicious attack at Sydney gym Crunch Fitness

A man has been arrested following a violent attack outside a Sydney gym in which he allegedly stabbed his ex-partner repeatedly.

The brutal attack occurred in Alexandria on Wednesday at around 12.30 pm.

The 45-year-old man was allegedly hiding under a car outside the Crunch Fitness gym before jumping out and stabbing the 39-year-old woman in the chest, neck and ear.

Emergency services responded and the victim was treated at the scene before being taken to Royal Prince Alfred Hospital in a serious condition.

On Thursday morning, the 45-year-old man voluntarily presented himself at Dee Why Police Station, where he was arrested and taken to Manly Police Station for further questioning.

Inquiries are ongoing and police are urging for anyone with information to contact Crime Stoppers at 1800 333 000.

If you or someone you know needs help, contact 1800 RESPECT (1800 737 732), Sexual Assault Counselling Australia on 1800 211 028 or Lifeline on 13 11 14.