Police are investigating the circumstances surrounding an attack that has left a 30- year- old woman nursing a severe chop wound to the head, at hospital.

Agata Wells, a resident of Rancho Quemado Road, Erin had reportedly been walking along the roadway a short distance from her home at around 5:30pm on Monday, when a man emerged from the bushes and proceeded to chop her.

The assailant subsequently boarded a waiting car and escaped.

A motive for the attack is yet to be ascertained.