Woman attacked in suburban Perth park

A woman has been sexually assaulted while walking in a park in suburban Perth.

The woman, aged in her 20s, was walking along a path in Wireless Hill Park in Ardross just after 2pm on Monday when she was grabbed by a man and sexually assaulted, police say.

It is believed the man was riding a bicycle and is described as 175-185cm tall and aged 30 to 45, with tanned/olive skin.

He was wearing dark clothing, a helmet and sunglasses, had no facial hair and spoke with an Australian accent