A 55-YEAR-OLD woman was walking her dog about 7.30 am (AEDT) on Monday while she was sexually assaulted in Melbourne’s south.

Police said the woman was indecently assaulted along Clarendon Street at Frankston when a man ran towards her, pushed her to the ground and dragged her into tall grass.

He then sexually assaulted her before running off towards a railway line.

Police have released an image of the suspect, who is described as about 188cm tall, with olive skin and a solid build.

Police are appealing to the public to help locate the man responsible for the attack.