A woman who warned people about a man acting suspiciously on the day two young girls were assaulted inside a Guildford park toilet block has been urged to come forward.
The sisters, aged six and two, were sexually and indecently assaulted inside the toilets at Campbell Hill Pioneer Reserve on Thursday, January 9.
The girls were at the park with their family when they went to the public toilets together and were approached by the man, who fled after he attacked them.
Witnesses have told police that earlier in the day a woman warned people about a man she saw near the female toilets.
The woman was wearing a black head scarf, an olive and black, calf-length cardigan, black pants and black and white sneakers.
Child Abuse Squad detectives have formed Strike Force Sandyman to investigate the assaults.
Detective Inspector Peter Yeomans said the woman spoke to a number of people.
"Because she did see who we believe was the offender at this time so it would greatly assist police if we could speak to that person," he said.
"Then [we can] go through it with her if she either knows the person or she may be able to give a better description of the person.
"She was warning a number of people in the park that she saw the man acting suspiciously near the female toilets."
The man police are looking for has a tanned complexion, possibility of Middle Eastern or Mediterranean appearance, is 20 to 30 years old and has a medium to skinny build and black hair.
At the time of the attack he was wearing a black jacket with white markings and blue shorts.
Police have also urged anyone who took photos in the park on January 9 to contact them.