A woman running in the Tuggeranong Hill Nature Reserve was allegedly grabbed from behind by a man early on Saturday morning.

Police say the woman broke free from the man’s hold and ran away before calling police.

The man is described as Caucasian in appearance in his late 20s to early 30s, with brown, shoulder-length hair, and was wearing a black T-shirt with a white stripe, long tan pants and Vans shoes. He also had a black electric scooter with him.

Call 1800 333 000 or via the Crime Stoppers ACT website.